France’s minority government seemed to be on the verge of collapse Tuesday, as opposition lawmakers from both the left and the far right pledged to oust Prime Minister Michel Barnier’s Cabinet. A no-confidence vote is set for Wednesday in parliament, following a contentious budget debate, and it has a high likelihood of passing. If the motion succeeds, Barnier’s Cabinet will become the shortest-lived in France’s modern history, signaling an unprecedented era of political instability. In that case, President Macron would be responsible for appointing a new prime minister.

Following the parliamentary elections June-July, the National Assembly, France’s powerful lower house of parliament, is divided into three major blocs: a left-wing coalition known as the New Popular Front, Macron’s centrist allies and the far-right National Rally party. None won an outright majority.

In September, President Macron asked Barnier, a conservative, to form a government dominated by Republicans and centrists — implicitly relying on the far right’s goodwill to be able to stay in power.

However, far-right leader Marine Le Pen now says her party will vote for bringing the government down, accusing Barnier of ignoring her demands.

Meanwhile, the left-wing coalition denounces an “austerity budget” and criticizes “the absence of dialogue and disregard for parliamentary work.”

The National Assembly stated that the no-confidence motion must secure a majority of votes to pass, requiring at least 288 of the 574 lawmakers currently in office.

With over 330 lawmakers on the left and far right some may abstain from voting.