President Donald Trump’s latest travel limitations may keep fans from the 19 named nations from seeing their athletes compete in some of the globe’s most important sporting events in the next several years,

GENEVA (AP) — U.S. President Donald Trump often says the 2026 World Cup and 2028 Los Angeles Olympics are among the events he is most excited about in his second term. Yet there is significant uncertainty regarding visa policies for foreign visitors planning trips to the U.S. for the two biggest events in sports.

The ban, which revives a controversial measure from Trump's first term, took effect Monday morning. Here's what to know about who's affected, who's exempt and how foreign leaders are responding.