HUFFINGTON POST

Sen. Susan Collins, R-Maine speaks during a news conference on Capitol Hill in Washington, Tuesday, June 21, 2016, to unveil a new gun legislation proposal. (AP Photo/Evan Vucci)

Sen. Susan Collins, R-Maine speaks during a news conference on Capitol Hill in Washington, Tuesday, June 21, 2016, to unveil a new gun legislation proposal. (AP Photo/Evan Vucci)