Actually Leno is surprisingly non-partisan in his barbs.
He’s snarked about Zero, too. And of course Plugs keeps him and his writers awash in new comedy material.
I wrote on another thread - Seems that he pokes at the President quite a bit. The one the other night had something like:
“The President is going non-stop in his re-election campaign in order to secure another four years in office. When asked why he felt so strongly about getting re-elected he replied “What? Good luck in me trying to find another job in THIS economy”