10:29 AM PT -- A lot of people might've been upset with Kanye's MAGA fashion choice on 'SNL,' but one person who's coming to his defense ... none other than President Trump himself. The Prez tweeted Sunday that he no longer watches SNL, and called it a political ad for Dems. He then shouted out Kanye saying ... "Word is that Kanye West, who put on a MAGA hat after the show (despite being told “no”), was great. He’s leading the charge!"

Kanye West went on 'SNL' Saturday night ... but viewers didn't see it.

After guest host Adam Driver signed off, Kanye grabbed the mic and turned the stage into a bully pulpit, bitterly complaining producers were trying to muzzle him and deny him free speech and expression.

Kanye said he was pressured not to come on stage wearing what is now his signature "Make America Great Again" hat.

He complained the liberal news media along with others were painting a one-sided picture of the political and social landscape in America. Kanye vowed no one would tell him what he could say or think.

He mocked those who said he was in a "sunken place," and then broke into song.

Adam Driver reportedly walked off stage after he awkwardly stood in the corner.