Péter Magyar is Viktor Orbán’s most serious challenger yet

A major protest in Budapest yesterday is being seen by some as the start of a new political era for Hungary. A former insider of Viktor Orbán’s regime has turned against the Fidesz party, exposing an alleged culture of corruption and promising an alternative to the status quo.

Speaking to a crowd variously estimated at tens to hundreds of thousands, Péter Magyar portrayed himself as a revolutionary riding a wave of popular resentment against Fidesz, which he claims has “betrayed” its voters. “From now, nothing will be as it’s been,” he said, listing...