Donald Trump -- I'd Crush Obama In Golf ... No Doubt

More smack talk from Donald Trump ... this time he's calling out Barack Obama -- saying he'd destroy POTUS if they ever battled it out on the links.

Trump was in South Carolina when he was asked straight up how he thinks he would fare against the commander in chief. His response -- "I would win. No seriously ... I would."

Trump went on to say that he's won "many club championships" in his day -- though he didn't name one specifically.

"I love golf. Golf is a great thing," Trump added.

"When the President plays golf it's okay, but he should play with people he wants to make deals with ... congress people and people from other countries ... Not just his friends."

By the way, Trump is said to shoot in the high 70s ... Obama reportedly hits in the 90s. In fact, Trump's swing has been praised by famous golf swing coach Hank Haney.