CNN and NBC came out with a potentially big story Thursday night, reporting that Michael Cohen says Donald Trump was fully aware of the infamous meeting between Russians and some of Trump's closest advisers ahead of the election. On Friday, the president himself emphatically denied the allegation made by his former attorney. "NO, I did NOT know of the meeting with my son, Don jr.," Trump tweeted. "Sounds to me like someone is trying to make up stories in order to get himself out of an unrelated jam (Taxi cabs maybe?)." The latter is a reference to this. So is the Cohen allegation a big deal? Some opinions: