An embattled President Macron is facing increasing calls to announce snap elections or even to step down. His own allies are now putting pressure on him.

French Prime Minister Sebastien Lecornu has plunged France further into a political deadlock after he resigned just hours after forming a cabinet as Paris struggles to plug its mounting debt.

Lecornu – whose tenure, which ended on Monday, was the shortest in modern French history – blamed opposition politicians for refusing to cooperate after a key coalition partner pulled support for his cabinet. He joins a growing list of French prime ministers who since last year have taken the job only to resign a short time later.

Opposition parties in the divided French Parliament have increased pressure on President Emmanuel Macron to hold snap elections or even to resign – as have politicians and allies in his own camp. Analysts said Macron now appears to be caught on the back foot since Lecornu was widely seen as his “final bullet” to solve the protracted political crisis.

Here’s what to know about Lecornu’s resignation and why French politics are unstable:

What happened?

Lecornu and his ministers resigned on Monday morning after he had named a new government the previous day.

Lecornu took up his office on September 9 after his predecessor Francois Bayrou stepped down. His tenure lasted 27 days, the shortest since 1958 when France’s Fifth Republic began.