Pakistan’s political opposition toppled Prime Minister Imran Khan in a no-confidence vote in Parliament early Sunday after several political allies and a key party in his ruling coalition deserted him.

The opposition, which spans the political spectrum from leftists to religious radicals, will form a new government. The head of one of the largest parties, a brother of disgraced former Prime Minister Nawaz Sharif, is likely to take over as prime minister if confirmed in a vote Monday.

Anticipating his loss, Khan, who charged the opposition colluded with the United States to unseat him, has called on his supporters to stage rallies nationwide on Sunday. Khan’s options are limited, though. Should he see a big turnout in his support, he may try to keep the momentum of street protests as a way to pressure Parliament to hold early elections.

Khan earlier had tried to sidestep the vote by dissolving Parliament and calling early elections but a Supreme Court ruling ordered the vote to go ahead.

The vote comes amid cooling relations between Khan and Pakistan’s powerful military, which many of his political opponents allege helped him come to power in general elections in 2018. The military has directly ruled Pakistan for more than half of its 75 years and wields considerable power over civilian governments.