General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Tom Cotton, General John F. Campbell

U.S. Senator Tom Cotton (R-Arkansas) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Tom Cotton, General John F. Campbell

U.S. Senator Tom Cotton (R-Arkansas) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Tom Cotton, General John F. Campbell

U.S. Senator Tom Cotton (R-Arkansas) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Tom Cotton, General John F. Campbell

U.S. Senator Tom Cotton (R-Arkansas) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Richard Blumenthal, General John F. Campbell

U.S. Senator Richard Blumenthal (D-Connecticut) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Richard Blumenthal, General John F. Campbell

U.S. Senator Richard Blumenthal (D-Connecticut) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Richard Blumenthal, General John F. Campbell

U.S. Senator Richard Blumenthal (D-Connecticut) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Richard Blumenthal, General John F. Campbell

U.S. Senator Richard Blumenthal (D-Connecticut) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Mike Rounds, General John F. Campbell

U.S. Senator Mike Rounds (R-SD) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Mike Rounds, General John F. Campbell

U.S. Senator Mike Rounds (R-SD) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Thom Tillis, General John F. Campbell

U.S. Senator Thom Tillis (R-NC) listens to Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Mike Rounds, General John F. Campbell

U.S. Senator Mike Rounds (R-SD) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joni Ernst, General John F. Campbell

U.S. Senator Joni Ernst (R-Iowa) listens to Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

General John F. Campbell

Afghanistan Operations Commander General John F. Campbell testified before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Senator Mike Rounds, General John F. Campbell

U.S. Senator Mike Rounds (R-SD) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joe Manchin, General John F. Campbell

U.S. Senator Joe Manchin (D-WV) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joe Manchin, General John F. Campbell

U.S. Senator Joe Manchin (D-WV) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joe Manchin, General John F. Campbell

U.S. Senator Joe Manchin (D-WV) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joe Manchin, General John F. Campbell

U.S. Senator Joe Manchin (D-WV) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joe Manchin, General John F. Campbell

U.S. Senator Joe Manchin (D-WV) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

Joe Manchin, General John F. Campbell

U.S. Senator Joe Manchin (D-WV) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. (Photo by Jeff Malet)

U.S. Senator Thom Tillis (R-NC), General John F. Campbell

U.S. Senator Thom Tillis (R-NC) (left foreground) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. Sen. Joni Ernst (R-Iowa) (right) watches. (Photo by Jeff Malet)

U.S. Senator Thom Tillis (R-NC), General John F. Campbell

U.S. Senator Thom Tillis (R-NC) (left foreground) questions Afghanistan Operations Commander General John F. Campbell during testimony before the U.S. Senate Armed Services Committee on Capitol Hill in Washington D.C. on Thursday, Feb 12, 2015. Sen. Joni Ernst (R-Iowa) (right) watches. (Photo by Jeff Malet)