These 3 Trump associates have insinuated he knew about meeting with Russians during his campaign
Former Mayor Rudy Giuliani of New York speaking at a forum titled “Countering Iran’s Nuclear Terrorist Threats” hosted by the Iranian American Community of Arizona in Phoenix, Arizona. (Gage Skidmore/Flickr)

President Donald Trump's long-time lawyer Michael Cohen is now the third person in Trump's circle to refuse to confirm that Trump didn't know about a 2016 meeting with Russian lobbyists in Trump Tower.

During a Monday interview, Cohen wouldn't say whether Trump was aware of the meeting. He declined to answer the question "under advice of my counsel."

Trump's lawyer Rudy Giuliani said he "would be surprised if he could remember" the meeting, giving the president a way to deny knowledge of the meeting without ever actually confirming he didn't know at the time.

Former Trump campaign aide Sam Nunberg was significantly more straight-forward in his response about the meeting, telling MSNBC in March that Trump "may have done something during the election" and that the president lied when claiming not to know about the meeting.

A focus of special counsel Robert Mueller's investigation is whether Trump knew about the meeting with Russian lobbyists during his presidential campaign and whether he tried to hide the purpose of the meeting.