Trump’s reaction in this story is that he backed Team USA and said they should have their strongest players available, then joked that if the U.S. lost to Belgium, he would call it “rigged.”

What happened

Belgium beat the U.S. 4-1, and the buildup included a controversy over a red- card decision that Trump had reportedly phoned FIFA about.

Why people are talking about it

Belgium players then mocked Trump and FIFA afterward, turning the match into a bigger social-media moment than a normal 4-1 defeat.

Simple read

So, in plain terms: Trump was supportive before the match, but his “rigged” joke became part of the postgame chatter after the U.S. lost 4-1.

TL;DR: Trump said the game should be played fairly with full-strength squads and joked that a U.S. loss would be “rigged,” which Belgium later referenced after the 4-1 result.