Obama met in the Oval Office with DHS Secretary Johnson.
Blog Briefing Room
Boris Nemtsov was shot in the back Friday in Moscow.
Airport security checkpoints will continue to function.
"It's hard to let you go," the president said.
Wendy Sherman said a deal would ensure Iran "cannot acquire a nuclear weapon."
Rebecca Shabad 02/27/15 05:15 PM EST
The vote is a stunning defeat for Speaker John Boehner and his leadership team.
The luxurious office attracted attention on social media.
The president mourned actor Leonard Nimoy, who died Friday.
Ashraf Ghani reportedly wants the U.S. slow down its timetable for troop withdrawal.
Josh Earnest says he has not "had an opportunity" to get the president's opinion.