A Putin ally suffered a major defeat in the election after 16 years in power.

True if official results of the April 2026 Hungarian parliamentary election show that Orbán's Fidesz (with KDNP) lost, either losing its majority or being clearly beaten by an opposition party such as Tisza, after governing since 2010 (16 years). Mostly true if Fidesz lost power or its majority but the result was narrow enough that calling it a 'major' defeat is debatable, or if there is a minor slip in a detail such as the number of years. Mixed if Fidesz lost seats or its supermajority but stayed in government. Mostly false if Fidesz kept its majority with only small losses. False if Fidesz won the election comfortably.

Set before the research began.

1. E1 2026 Hungarian parliamentary election - Wikipedia Wikipedia

   “The incumbent Fidesz–KDNP government of Prime Minister Viktor Orbán was defeated in a landslide by the opposition Tisza Party, led by MEP and former Fidesz member Péter Magyar, ending the 16-year Orbán era.”

2. E2 2026 Hungarian parliamentary election - Wikipedia Wikipedia

   “Fidesz's seat count was more than halved, dropping to 52 seats on 38.6% of the votes.”

3. E3 2026 Hungarian parliamentary election - Wikipedia Wikipedia

   “With all precincts counted, Tisza Party secured 141 seats in the 199-seat National Assembly on 53.2% of the vote, enough for a two-thirds supermajority that would allow it to amend the constitution without the need for support from other parties.”

E1 reports that Viktor Orbán's Fidesz–KDNP government lost in a landslide to the Tisza Party, ending the 16-year Orbán era. That matches both the "major defeat" and the "16 years" in the claim. E2 and E3 give the counted results: Fidesz fell to 52 seats on 38.6% of the vote, while Tisza won 141 of 199 seats on 53.2%, a two-thirds supermajority. The result was clearly decisive rather than narrow.