BUDAPEST, Hungary (AP) — Hungary’s two main political parties will mark a national holiday on Thursday by holding rival demonstrations that will likely bring hundreds of thousands to the streets and kick off a campaign for elections next year. With the ballot approaching in April, long-serving Prime Minister Viktor Orbán — trailing in most polls to his main political rival, Péter Magyar — hopes to use Thursday’s show of force to reinvigorate his base that has had its confidence shaken by a