O.J. Simpson is getting political -- railing against his old pal Donald Trump's MAGA catchphrase ... while begging people to vote.
The whole thing begs the question ... Is O.J. trying to take out Trump? Sure seems that way.
The 73-year-old ex-con says his new rant was inspired by a golf outing with a buddy who was sporting a "Make America Great Again" hat ... which really rubbed him the wrong way.
"I was teasing him a little bit," Juice admits ... "He said 'Man, why does everyone get on my case when I wear this hat?