The Washington Post endorsed Sen. Tim Kaine on Sunday, giving the Democrat a high-profile boost less than a month before he faces re-election in the 2018 midterm elections.

The piece from the outlet's editorial board praised Kaine as being known on Capitol Hill "as one of the upper chamber’s most constructively pragmatic lawmakers, regularly reaching across the aisle to sponsor legislation and forge relationships."

The Post also took a shot at Kaine's GOP rival, Corey Stewart. "Mr. Stewart, who made his name bashing illegal immigrants as a member of the Prince William Board of County Supervisors, has run a campaign based largely on the politics of resentment, using angry, racially coded appeals, provocations and, in recent weeks, outright slander," the opinion piece said.

The post previously endorsed Kaine, a former Virginia governor and Hillary Clinton's vice presidential running mate in 2016, in 2012 for the U.S. Senate.

A RealClearPolitics polling average gives Kaine a 18.5 percentage point advantage over Stewart.

Editor's note: Corrects the year in which Sen. Kaine is seeking re-election.