ATHENS, Greece — Prime Minister Alexis Tsipras is trying to rally his party members today to support a preliminary financial rescue deal that includes measures so onerous some of his own ministers were in open revolt.

The government must pass several measures through Parliament by Wednesday night, including consumer tax increases and pension reforms, to start negotiations with European creditors on a third bailout worth as much as $95 billion.

The Greek leader faced a stark choice at a marathon eurozone summit that ended Monday morning: agree to the deal that tramples on practically all of his pre-election promises to repeal austerity, or see his country’s banks collapse and Greece crash out of Europe’s joint currency.

Tsipras is expected to have the numbers in Parliament to pass the measures, since he will have the support of most opposition parties. But the government’s political survival is in danger if large numbers of its own lawmakers resign their seats or openly vote against the bill.

Energy Minister Panagiotis Lafazanis denounced the deal and called on the prime minister to cancel it before legislation reaches Parliament.