KEY POINTS
  • The costliest regular House race in the nation is in the Southern California district being vacated by Republican Rep. Darrell Issa.
  • There are 16 candidates vying for the seat in California's 49th Congressional District, which is located in portions of Orange and San Diego counties.
  • Nearly $15.3 million has been spent so far by candidates and outside groups for the seat, including more than $9.2 million by four top Democrats.
  • The Democrats see the Issa seat as an opportunity in their attempt to regain a majority in the House.
Republican US Representative Darrell Issa

The race to replace retiring California Republican Rep. Darrell Issa is shaping up to be the costliest regular congressional contest in the nation, according to OpenSecrets.org.

There are 16 candidates vying for the seat in California's 49th Congressional District, which includes portions of northern San Diego County and southern Orange County. Despite the district's long history of being a conservative bastion in the southern part of the state, President Donald Trump actually came in second place in Orange County in the 2016 presidential election to Democrat Hillary Clinton and lost by an even bigger margin in San Diego County.