Republican Barbara Comstock and Democrat John Foust are locked in a tight race to replace retiring GOP congressman Frank Wolf in Virginia’s Republican-leaning tenth district. So voters who have elected Wolf by a comfortable margin for more than three decades should take note of a new endorsement: John Foust has gotten a ringing endorsement from the far-left blog the Daily Kos, which calls Foust a “bona fide progressive.”

The blog recently released Wolf’s responses to its candidate questionnaire. His responses, they note happily, are “solid down the line.”

Foust says that he has no intention of caucusing with moderate Democrat groups such as Third Way or the Blue Dog Democrats. He expresses his support for card check, which would essentially deny employees the freedom to cast a secret ballot and dramatically expand the power of labor unions. He reiterates his opposition to raising the retirement age for Social Security, rejects means-testing those programs, and supports a risky proposal from Iowa Democrat Tom Harkin to expand the already beleaguered program.

Foust also supports the idea of a public option in the Affordable Care Act, the Medicare You Can Buy Into Act (H.R. 4789), a proposal by liberal Florida Democrat Alan Grayson pitched as a “progressive fix” of the Affordable Care Act. The act, which has 80-some Democratic co-sponsors, would allow any citizens or permanent residents who want to purchase Medicare coverage — potentially expanding an already-swamped pool and disrupting the Medicare system on the theory that the single-payer system has lower administrative costs than private insurers.

Foust’s opponent, Comstock, has a strong record of bipartisan reform, as National Review explained in its endorsement of her. Meanwhile, John Foust has the ringing endorsement of the Elizabeth Warren–cheering Daily Kos. The voters of Virginia’s tenth district have a pretty stark choice.