Cohen claims Trump knew in advance of 2016 Trump Tower meet

President Trump’s former lawyer, Michael Cohen, has asserted that the president knew about the 2016 Trump Tower meeting involving a Russian lawyer, Donald Trump Jr. and other Trump aides, a source told NBC News, and Cohen is willing to make this claim to Special Counsel Robert Mueller. Trump and Trump Jr. denied these claims. NBC’s Peter Alexander reports for TODAY.July 27, 2018