(Bloomberg) -- Venezuela’s María Corina Machado took a commanding lead in an early count of Sunday’s opposition primary after a demonstrative turnout, putting her in position to challenge President Nicolás Maduro in the most serious threat to the ruling socialist regime in at least a decade.Most Read from BloombergUS Push for Release of Hostages Delays Israeli Ground War, But Won’t Stop ItIsrael Latest: Oil Declines as Hostage Talks Delay Gaza InvasionCar Owners Fall Behind on Payments at Highes