Viktor Orban is facing his first serious challenge in years in Peter Magyar. The two politicians held rallies on Hungary's national day that outlined very different visions for the country's future. Hungary's ruling and opposition parties each held major rallies on Sunday as they race to shore up support ahead of hotly contested elections on April 12. The rallies, held to mark the country's national day, pitted right-wing, pro-Russia Prime Minis... [2309 chars]