President Barack Obama speaks in the briefing room of the White House in Washington, Tuesday, April 5, 2016. "Good luck with that," the president said in response to questions about Donald Trump's proposal to try to force Mexico to pay for a border wall by targeting billions of dollars in remittances sent by immigrants living in the U.S. (AP Photo/Jacquelyn Martin)
President Barack Obama speaks in the briefing room of the White House in Washington, Tuesday, April 5, 2016. "Good luck with that," the president said in response to questions about Donald Trump's proposal to try to force Mexico to pay for a border wall by targeting billions of dollars in remittances sent by immigrants living in the U.S. (AP Photo/Jacquelyn Martin) Jacquelyn Martin AP
President Barack Obama speaks in the briefing room of the White House in Washington, Tuesday, April 5, 2016. "Good luck with that," the president said in response to questions about Donald Trump's proposal to try to force Mexico to pay for a border wall by targeting billions of dollars in remittances sent by immigrants living in the U.S. (AP Photo/Jacquelyn Martin) Jacquelyn Martin AP