Virginia Democratic Sen. Tim Kaine, fresh from a devastating defeat as Hillary Clinton’s running mate, will not run for president or vice president in 2020, an aide said Thursday.

“He will run for re-election to the Senate in 2018 and serve his full term in the Senate — where, at the will of Virginia voters, he hopes to be for a very long time in the model of John Warner,” Kaine spokeswoman Amy Dudley said.

Warner served five terms in the Senate representing the commonwealth before retiring in 2009. A popular Republican with a military background and a reputation for bucking his party, he endorsed Clinton in this year’s election.

Kaine said his “highest and best use,” would be to stay in the Senate, according to a tweet from Richmond Times-Dispatch political reporter Jim Nolan.

BREAKING: @timkaine up for reelection in 2018, says he will not seek presidency or VP in 2020. TK: “highest and best use” is 2 serve in Sen.

— Jim Nolan (@RTDNolan) November 17, 2016

Kaine is up for re-election to his Senate seat in 2018.

Stephanie Akin contributed to this report.