Trump is currently in the phase where he is desperately trying to build a legacy. Hence all the trivial bullshit with monuments, renaming stuff, and what have you. He's terrified that once he's gone, he'll be gone and forgotten. Even said it himself - that if he doesn't do it now, nobody else will when he's gone.

Expect more of this. Wouldn't put it past him if he in Nov 2028 decides to rename a state after himself.