Rep. Darrell Issa (R-Calif.) announced Wednesday he will retire from Congress.

Throughout my service, I worked hard and never lost sight of the people our government is supposed to serve, Issa said in a statement. Yet with the support of my family, I have decided that I will not seek re-election in Californias 49th District.

Issa, one of the wealthiest members of Congress, narrowly won his re-election race against Democrat Doug Applegate in November 2016 by just 1,621 votes. It was Issas first competitive race in more than 15 years.

Applegate has already announced plans to run for Issas seat in 2018.

Issa is the second California Republican to announce his retirement this week, joining Rep. Ed Royce . Both were considered among the partys most endangered members and top targets for potential Democratic pickups in 2018. Democrat Hillary Clinton won their districts in the 2016 presidential election.