BUDAPEST, Hungary (AP) — The front-runner in Hungary’s parliamentary election said on Monday that an alleged backchannel between Budapest and Moscow should be investigated as “treason” after the Washington Post reported that Hungary’s government has for years provided Russia with detailed information from EU Council meetings. Péter Magyar, the main political opponent of Hungary’s long-serving leader Viktor Orbán, said in a social media post that Hungarian Foreign Minister Péter Szijjárto “