Trump's deportation plan could slice 2 percent off U.S. GDP: study

By Luciana Lopez NEW YORK (Reuters) - Donald Trump's vow to round up and deport all of America's undocumented immigrants if he is elected president could shrink the economy by around 2 percent, according to a study to be released on Thursday by conservative think tank the American Action Forum.     The research adds to concerns about the Republican White House nominee's policy proposals, which range from tearing up international trade agreements to building a wall along the U.S. b