FIGHT FIGHT FIGHT!!!
Jake Paul is doubling down on his support for Donald Trump -- squaring up with the former president at an event over the weekend ... and telling his millions of followers the country needs No. 45 back in the Oval Office now more than ever.
27-year-old Paul -- who has been increasingly outspoken on his political stance following the July 13 assassination attempt -- got some one-on-one time with Trump at the Bitcoin conference in Nashville ... and used the opportunity to playfully pretend like they were getting ready to scrap.