Anthony Zurcher: Democrats surge deep into Republican territory with historic wins

This is already shaping up to be a historic night for Democrats, with the party winning control of US House of Representatives and on their way to flipping the Senate, too.

The Democrats notched their first shock win in the Senate, when Annie Andrews beat Darline Graham, who had been appointed to the seat after the death of her brother, Senator Lindsey Graham.

Few analysts had that seat in play even a few months ago.

Two Senate races that a year ago were thought to be battlegrounds have turned out to be slam dunks for the Democrats - Jon Ossoff's re-election in Georgia and the open Republican-held seat in North Carolina.