PARIS French far-right figurehead Marine Le Pen has threatened to back a no confidence motion that could topple the government of Prime Minister Michel Barnier in a standoff over the budget, saying after talks both sides were entrenched in their positions. Months of political tensions since right-winger Barnier became prime minister at the helm of a minority government appointed by President Emmanuel Macron in the wake of this summer's elections are coming to a head over the budget which has