Donald Trump has made a public flex of his political influence abroad on a scale that few, if any, U.S. presidents have, trying to marshal power he’s used domestically to sway races around the world. By using endorsements to reward loyal and like-minded leaders, he has shattered a U.S. tradition of avoiding overt involvement in the internal politics of other countries. The most significant test of Trump’s political power abroad comes Sunday, when voters in Hungary render a verdict on Prime Minister Viktor Orbán’s bid for a fifth term. But Orbán has been trailing in independent polls and Trump may have less sway than he once had after his unpopular push to acquire Greenland and war in Iran.