Derek Tran, a first-time Democratic candidate, has flipped a toss-up California House seat, narrowly defeating Republican Rep. Michelle Steel, who conceded on Wednesday after a protracted vote count.
Tran had declared victory early this week and currently leads by roughly 600 votes.
Steel, a two-term representative, had been an elusive target for Democrats, occupying an Orange County district that had backed President Joe Biden in the 2020 election.
The race ended up being the most expensive House battle in the country, with at least $46 million spent by the campaigns and an array of outside groups.