Talks between Spain’s socialists and far-left Podemos to agree a coalition government were stalled on Thursday, casting doubt on whether Prime Minister Pedro Sanchez will win a a crucial confidence vote later in the day.

Failure to get the necessary backing in the parliamentary vote would take Spain a step closer to holding its fourth elections in as many years.

Representatives from both parties have been trying to secure a deal for what would be Spain’s first post-dictatorship coalition government following an inconclusive April general election.