The most recent vote counts show the GOP incumbent trailing Democratic challenger Derek Tran by just 613 votes three weeks after Election Day.

Rep. Michelle Steel, a two-term incumbent in California’s 45th congressional district, appears to have conceded to Derek Tran Wednesday afternoon after a long slog of a race that is one of the nation’s closest remaining contests yet to be called.

Democrat Derek Tran has defeated two-term Republican U.S. Rep. Michelle Steel in a Southern California House district that was specifically drawn to give Asian Americans a stronger voice on Capitol Hill.