Democratic State Sen. Juan Vargas will face Republican Michael Crimmins in a runoff election in November for the District 51 congressional seat.
Vargas picked up 48.03 percent of the vote in the Tuesday primary election to replace Congressman Bob Filner.
Crimmins received 20.97 percent of the ballots returned and Democrat Denise Ducheny came in third with 14.13 percent.
The two Democratic challengers to incumbent Republican Brian Bilbray in the 52nd congressional district kept it close Tuesday night, but former San Diego City Council President Scott Peters edged out former Assemblywoman Lori Saldaña and will face Bilbray in November.
Peters received 22.58 percent of the votes and Saldaña received 21.98 percent. Bilbray picked up 41.30 percent of the votes.