Rep. Greg Walden (R-OR) will not run for reelection in 2020, the Republican lawmaker’s office confirmed to TPM on Monday.

In a video sent to TPM, Walden said he’s “confident” that he would’ve won another term and that he’s “optimistic” that Republicans will win back the House.

“But I also know that for me, the time has come to pursue new challenges and opportunities,” he continued. “So, I will not seek re-election to the U.S. House of Representatives, nor election to any other office, but instead I will close the public service chapter of my life, thankful for the friends I’ve made and the successful work we’ve done together.”

Walden serves as the ranking member of the House Energy and Commerce Committee. He is the only Republican among Oregon’s five congressional representatives.

The Oregon lawmaker’s decision follows a host of retirement announcements among House Republicans over the past several months, and the GOP expects more to come in the future.