moments with his lawyers. here's a key point. the president could have prevented mcgahn from speaking to mueller by invoking executive privilege, but he chose not to. mcgahn's attorney said over the weekend, quote, president trump, through counsel, declined to assert any privilege over mr. mcgahn's testimony so mr. mcgahn answered the special counsel team's questions honestly as any person interviewed by federal investigators must. so what did he tell mueller? well, we don't know for sure. but "the times" says, quote, mr. mcgahn laid out how mr. trump tried to ensure control of the russia investigation. giving investigators a mix of information both potentially damaging and favorable to the president. mr. mcgahn cautioned to investigators that he never saw mr. trump go beyond his legal authorities, although the limits of executive power are somewhat americay. was it a mistake for trump to allow mcgahn to speak to mueller? depends who you ask.