A POTUS, a Biebs and a Kardashian walk into a fight -- that's what's going down at UFC 264 in Vegas this weekend ... with a massive list of celebs set to watch Conor McGregor face-off against Dustin Poirier!!!
Of course, Dana and Trump go way back -- in UFC's early days, Trump offered White his casinos to host fights ... and the UFC honcho went on to throw his support behind #45 during his 2016 presidential campaign.
On top of that, Trump and Conor have had nothing but positive words for each other in the past ... with McGregor calling him a "phenomenal president."
Phenomenal President. Quite possibly the USA 🐐. Most certainly one of them anyway, as he sits atop the shoulders of many amazing giants that came before him. No easy feet. Early stages of term also. Incredible. Congrats and Happy Martin Luther King Jr. day America 🇺🇸❤️🇮🇪