Impeachment might happen.
But if you really want to make the Trump administration’s cheeks clench you need to make removal an issue. That takes the Republican controlled Senate. So go ahead and take a look at all the GOP Senators who wrote glowing tributes to John Bolton on his way out the door. Then compound that with Bolton’s willingness to embarrass Trump for booting him. Who knows what he knows, but he can certainly feed the media machine with enough fear, uncertainty and doubt to make things really uncomfortable.
When he left, I joked “John Bolton, welcome to #TheResistance” but if he starts kicking up dirt don’t be surprised when the news he makes is an applause line for Colbert.