Barack Obama just gave Michael Jordan the royal seal ... telling Prince Harry that he'd take His Airness over King James as the GOAT, without hesitation.
Obama sat down with Harry in a rare interview that aired Wednesday on BBC Radio 4 ... talking about everything from his presidency to Donald Trump.
But, when it came to the Prince's round of rapid-fire questions ... Harry immediately got Barack -- a HUGE NBA fan -- to close the book on the MJ vs. Bron debate.
"Jordan. Although I love LeBron, I'm a Chicago guy," Obama said.
Of course, Barack's pick ain't too surprising given his Bulls allegiance ... even though him and MJ haven't always seen eye-to-eye on everything.