Kid Rock's post included a black-and-white photo and a boast about golfing with Trump, but contained misspellings of a song title and Luciano Pavarotti's name.
Newsom's office reshared the image with the caption “cute couple,” continuing a pattern of trolling Trump.
Newsom has previously targeted Trump regarding redacted Jeffrey Epstein files and also trolled Kid Rock with a satirical poster, which prompted a crude response from the singer.
Kid Rock has consistently supported Trump at public events, while Trump's use of Luciano Pavarotti's music at rallies has drawn objections from the late singer's family.