The White House has never seen anything like the UFC show President Donald Trump is hosting to celebrate his 80th birthday and the nation’s 250th anniversary.UFC Freedom 250 is bringing seven fights within an eight-sided, wire-mesh cage to the White House South Lawn on Sunday at 8 p.m. Eastern.The event is taking place against the backdrop of the United States’ unpopular and costly war against Iran. An agreement to end the conflict could be close, but the crucial details are still to be negotiated.Here’s what to know:How to watch: The main card airs live only on Paramount+, a shift away from UFC’s long-time pay-per-view model.Who’s on the card: Headlining the night are Spanish-Georgian lightweight champion Ilia Topuria vs. American interim champ Justin Gaethje for the UFC lightweight title. The event’s only other championship fight has Brazil’s Alex Pereira taking on France’s Ciryl Gane for the interim UFC heavyweight title. But first, there are five other fights on the main card, which include former title-fight participants Michael Chandler and Derrick Lewis. The weather: The forecast calls for hot and muggy conditions with thunderstorms possible. The fighters should be kept reasonably dry under the arena’s overhead cover, and Trump is also likely to watch from a protected, covered area. But everyone else would almost certainly get wet. UFC chief Dana White has vowed that even heavy lightning won’t stop the show.