UFC 331 is confirmed for September 19 at Crypto.com Arena in Los Angeles, headlined by a flyweight title rematch between Joshua Van and Alexandre Pantoja with co-main lightweight contender Arman Tsarukyan facing Mauricio Ruffy. Trader consensus heavily favors Trump skipping the event, reflecting the absence of any official White House or UFC confirmation of attendance amid typical presidential scheduling demands around that date. Recent patterns show selective appearances at UFC cards tied to key fight nights or personal connections like Dana White, yet no comparable signals have emerged here, and the West Coast venue adds logistical barriers relative to East Coast or DC-based priorities. The implied probability aligns with historical precedent for non-attendance at mid-September numbered events absent explicit advance notice.