Hungarians head to the polls on 12 April.
Tisza Party leads by 19–23 points over Fidesz.
Election considered Europe's most consequential.
Briefing: Hungarian opposition Tisza party cements lead ahead of April elections, polls show
Strategic angle: Set of polls indicate that Péter Magyar’s Tisza Party is ahead of Viktor Orbán’s Fidesz by 19–23 points among likely voters.