Donald Trump -- I DOMINATE AT GOLF ... 'Cause That's What Winners Do

The war for the White House has hit the links ... with Donald Trump claiming he's such a WINNER -- he even dominates at golf.

Trump told Time Magazine he's not just good -- but he's won "many golf championships" over the years ... crushing some pretty decorated players in the process.

"You know I’ve had great success," Trump said ... "I don’t know if you guys play golf. But to win a club championship is hard, literally hard. And you have to beat scratch players ... you got a lot of good players."

"I’ve won many club championships. So my life has been about winning. My life has not been about losing."