A protester holds a placard outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018. REUTERS/Yuri Gripas

Protesters gather outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018.

Protesters gather outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018.

A mock-up of an Iranian passport is on display at a protest of President Donald Trump's travel ban outside the U.S. Supreme Court in Washington, DC, U.S., April 25, 2018.

Immigrants from Iran Yasi Ebadi and her child Dela, 8 months old, join protesters outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018.

Protesters gather outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018.

Protesters gather outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018.

Syrian-American Isra Chaker speaks during a protest outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries, in Washington, DC, U.S., April 25, 2018.

A mock-up of banned Muslim travellers' passport is placed outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries in Washington, DC, U.S., April 25, 2018.

Mock-ups of banned Muslim travellers' passports are placed outside the U.S. Supreme Court, while the court justices consider case regarding presidential powers as it weighs the legality of President Donald Trump's latest travel ban targeting people from Muslim-majority countries in Washington, DC, U.S., April 25, 2018.

A mock-up of an Syrian passport is on display at a protest of President Donald Trump's travel ban outside the U.S. Supreme Court in Washington, DC, U.S., April 25, 2018.