France's new prime minister and his government have resigned hours after Lecornu announced his cabinet line-up, in a major deepening of France's political crisis that drove stocks and the euro sharply lower.
The swift, unexpected resignation on Monday came after allies and foes alike threatened to topple the new government.
The far-right National Rally immediately urged President Emmanuel Macron to call a snap parliamentary election.
The hard left France Unbowed said Macron himself must go.
Lecornu, who was Macron's fifth prime minister in two years, stayed in the job for only 27 days.
His government lasted 14 hours, making it the shortest-lived in modern French history at a time when parliament is deeply divided and the euro zone's second-largest economy is struggling to put its fina