Nothing major.

They might investigate and harass Trump enough that he feels too under siege to do certain kinds of overt imperialism (think kidnapping Maduro) or even withholds doing it as kind of punishment to the establishment. On the other hand being under siege he might lash out abroad in an attempt to create some kind of "legacy" given he'll no longer have any ability to do major things domestically but something like knocking over the Cuban revolution for example would make him a hero to many reactionaries and get him in the history books. Could also drive him to use nukes on Iran. Could result in a lot of things or a bunch of nothing. But it won't really have major implications besides maybe Ukraine getting a bit better support and Russia perhaps having to sober up more about no negotiated end being in sight that restores relations with the west.