Joaquin Castro, Supreme Court

Rep. Joaquin Castro (D-Texas) speaks to a reporter outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Stronger communities, Stronger America" reads the sign. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Salud, Dignidad, Justice (good health, dignity, justice)" reads the sign. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Sister Simone Campbell, Supreme Court, immigration

Sister Simone Campbell, of "Nuns On The Bus" speaks to Father Clete Kiley. a priest of the Roman Catholic Archdiocese of Chicago. Simone Campbell, SSS is an American Roman Catholic Religious Sister, lawyer, lobbyist and executive director of NETWORK. She belongs to the Sisters of Social Service. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Members of Sisters of Mercy wearing shirts from the organization "Fight for Families" stand outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Deportation is a bad habit" says Sister Mary Ellen Lacy, a Daughter of Charity and one of the "Nuns on the Bus". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"UnFreeze DAPA" reads the sign, invoking and image of Pope Francis. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Keep your PAWS OFF DAPA" reads the sign carried by Pisco the dog. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Demonstrators from Democracy Awakening march in front of the Supreme Court on the way to the Capitol as other demonstrators gathered outside the Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Demonstrators from Democracy Awakening march in front of the Supreme Court on the way to the Capitol as other demonstrators gathered outside the Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Demonstrators from Democracy Awakening bearing a "Golden Calf" march in front of the Supreme Court on the way to the Capitol as other demonstrators gathered outside the Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Don't Deport My Dad". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Do Not Separate Families". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Holding an American Flag, Helen (age 2) was among the thousands of demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Don't Deport My Dad". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Justice and Dignity for All US Immigrants". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Don't Blame a Mexican...[for] Unemployment" reads the sign. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Valery (age 5) demands "Justice and Dignity for All US Immigrants". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

Flannery Wasson of Washington D.C. as the Statue of Liberty. Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Supreme Court, immigration

"Justice and Dignity for Immigrants". Demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)

Jan Schakowsky, Supreme Court, immigration

Rep. Jan Schakowsky (D - IL) (left) joined demonstrators gathered outside the U.S. Supreme Court as it heard oral arguments in a challenge to President Obama's plan to protect millions of immigrants from deportation and allow them to work, on Monday, April 18, 2016 in Washington D.C. (Photo by Jeff Malet)