Matt Doheny’s entry into the race complicates the Republicans' chances to take the seat.
Mark Jacobs is looking more and more like the front-runner in a crowded GOP Senate primary.
Could local politics now be more appealing than Capitol Hill?
"Look at what we wound up with: Some bimbo who decided not to run again," said Baca.
The California Democrat is running for the San Bernardino County Board of Supervisors.
The New Jersey Democrat's exit opens up a safe seat expected to draw several candidates.
The American Crossroads spot in the Florida special election targets the Democrat.
Former tight end Clint Didier entered the race in Washington state.
District leaders chose filmmaker Aaron Woolf to defend the competitive New York district.
The Democratic super-PAC makes a play for seniors with its second special election ad.