What a remarkably disingenuous thing to say. One of the nation's most influential political leaders was just gunned down by an "anti-fascist" and you want to go on the attack like this?
Look in the mirror and try to summon up a better angel.
Let's say, for the sake of argument, that these are indeed "baseless" claims (they aren't). What authority does @NBCNews thinks it possesses right now to make such a determination?
Has no one told them that the jig is up?