Michael Cohen, President Donald Trump's former personal attorney, claims Trump knew in advance about a summer 2016 meeting at Trump Tower between top campaign staffers, including his son, Donald Trump Jr., and Russians said to be offering damaging information on Hillary Clinton, according to a CNN report late Thursday. Sources told CNN that Cohen was willing to confirm as much to special counsel Robert Mueller. Trump has repeatedly denied knowing about the meeting, but sources reportedly told CNN that Cohen was in the room with Trump when he was told about it, and approved the meeting ahead of time. The Mueller investigation has been looking into the meeting as possible evidence of collusion between the Trump campaign and Russia.