Jimmy Fallon, more an entertainer than political comedian, has apparently been hurt in the ratings by his lack of political comedy in the target-rich presidency of Donald Trump. On Monday's Tonight Show, Fallon got pretty political on Trump, but in his own way, playing to his strengths by impersonating Bruce Springsteen singing a modified version of the Boss classic "Santa Claus is Coming to Town." You can get a gist from the first line: "You better watch out, you better not cry, you better not lie to the FBI — Robert Mueller's coming to town." It gets punchier from there, with a Fallon smile. On Monday's Late Show, Stephen Colbert was Stephen Colbert, but he was running with a similar idea.