The quoted tweet is just the White House bragging about Vance showing up to UFC 250. The real joke is the framing: comparing a modern MMA event to the Roman Empire celebrating its 250th anniversary with actual gladiatorial combat. One is a sport with rules, safety equipment, and regulated violence. The other was state-sanctioned execution as entertainment. But sure, let's celebrate imperial anniversaries at UFC events while the administration wraps itself in historical legitimacy it doesn't have.