Greek Prime Minister Alexis Tsipras told parliamentarians in his leftwing Syriza party that it would be difficult for him to remain in office if he did not have their support in a key vote on Wednesday, a government official said. If I do not have its support, it will be difficult to be prime minister the day after," he told the lawmakers, according to the official. The meeting between the prime minister and the lawmakers came ahead of a vote in parliament to approve a sweeping austerity package demanded by European partners as a condition for beginning talks on a new bailout deal that would keep Greece in the euro.