Party has won 218 seats in lower chamber after Democrats unsuccessfully campaigned on need to curtail ‘dysfunction’

Republicans have secured a majority in the US House of Representatives , extending their hold on the lower chamber and delivering a governing trifecta in Washington that could give Donald Trump sweeping power to enact his legislative agenda.

The Associated Press determined on Wednesday evening that Republicans had won at least 218 seats in the 435-member House after a victory in Arizona, a call that came more than a week after polls closed across the US and as Trump made cabinet announcements that sent shockwaves through Washington .