Major victory forecast for Emmanuel Macron's party in French parliament vote

French voters are casting their ballots in the final round of parliamentary elections that could clinch President Emmanuel Macron's hold on power, as his fledgling party appears set to rout mainstream rivals.

Pollsters say that after its dominant performance in last week's first-round vote, Mr Macron's Republic on the Move party could win up to 450 seats on Sunday in the 577-seat National Assembly, the powerful lower chamber.