Hungarian opposition leader Péter Magyar is accusing the Kremlin of supporting the election campaign of Prime Minister Viktor Orbán with a new barrage of disinformation videos that are supposed to appear on Thursday. Orbán is the EU leader closest to Russian President Vladimir Putin — and a persistent obstacle to Brussels’ support for Ukraine — but he now faces the toughest fight of his political career in Hungary’s April 12 election, where polls put him about 10 points behind Magyar.   Magyar —