Politifact.com Truth-O-Meter rulings from National: Marco Rubio: "There are over 700,000 Americans on some watch list or another that would all be captured" in a Democratic amendment intended to stop suspected terrorists from buying guns.

"If these were perfect lists, that would be one thing," he said. "But there are over 700,000 Americans on some watch list or another that would all be captured under this amendment the Democrats offered. And that's the problem."...
http://www.politifact.com/truth-o-meter/statements/2015/dec/06/marco-rubio/marco-rubio-says-700000-americans-could-be-affecte/