Lessee...if I ere a god...
First, Trump would find himself dressed in a girl's plaid jumper with a white cotton blouse and polished black patent leather shoes, and with a giant polka-dot bow in his forelocks. Every time he tried to dress in a business suit, it would transform into the jumper outfit again, but with a time delay, so he wouldn't know when it would happen, except that it would always happen when he was speaking to the press or to his admirers.
Second, all automatic and semi-automatic weapons would turn into mini-pumpkins, and any newly manufactured weapons would also turn into mini-pumpkins. The psychotic, basement-dwelling misfits who plan on mass mayhem would have their brains implanted with a message to throw mini-pumpkins into crowds.
Nuclear weapons would transform into giant lumps of banana taffy.
The word 'lamb' in all Bibles would be transformed into 'bat', just for kicks. Blood of the bat, sacrificial bat, bat of God, you get the idea. Bat would be taken off the list of forbidden foods in Deuteronomy.
Marjorie Taylor Greene would hear a mysterious voice, audible only to her, which would whisper in her ear every time she finished a sentence, "You are batshit crazy and an evil media troll." She would only be able to still the voice if she left public life.
Janis, Jimi, and Otis would return from the dead and resume making music.
Cheap cold-fusion tech for all cars would be gifted to mankind.
Fox News anchors and personalities would be inflicted with a mysterious outbreak of Tourettes, with the most common expletives being 'Fuck', 'Fuck Trump', and 'Cocksucker', which would recur every ten or fifteen words or so.
Hannity, Tucker, Laura I., Jim Jordan, the My Pillow guy, Mrs. Clarence Thomas, Cruz, Gaetz, and DeSantis would all be outed as transgendered.
I have more, but even a god has to take a nap once in a while.