We’ve noticed that Fallon has been going after the dems pretty good recently, and his Trump jokes are actually softer and funnier than the hate filled stuff you hear on other shows. The kind of jokes that used to be common about Bush, Clinton, Gore etc. Not too partisan.
Just remember, it’s not Jimmy Fallon’s decision to do, or not do , these things.
It is the producers who tell the writers what to compose, that Jimmy reads. The reason they are backing off Trump and will go after the Dems is...... money.