CARACAS, Venezuela (AP) — Already grappling with street protests led by the right, Venezuelan President Nicolas Maduro is facing a new threat from an unlikely place: old-school leftists who accuse him of betraying the socialist legacy that carried him to power.

Maduro was tapped by Hugo Chavez as his preferred successor to the presidency, and is quick to invoke the late leader’s name, but orthodox socialists are grumbling over liberalized currency reforms they say are counter to the revolution.