The contest was the last unresolved House race in the country, and with Gray’s victory, Republicans won 220 seats to Democrats’ 215. Overall, Democrats gained one seat from their pre-election total. The Republican majority is likely to be even tighter in the early part of next year – former GOP Rep.

With all 435 House races projected, ABC News estimates Republicans will hold 220 seats and Democrats 215 in the 119th Congress.

Democrat Adam Gray has flipped California’s 13th District, handing Republicans a slimmer majority in the House.