Jamie Radtke won the backing of a tea party group in her race for the Senate. (Steve Helber/AP)

Radtke is the former leader of the Tea Party Patriots, a federation of 40 groups from around the state.

“Radtke, a Washington outsider and dedicated mother of three, offers Virginians the best leadership option to challenge the toxic policies of overspending and surging debt levels that are rapidly strangling our country as well as our children and grandchildren’s future,” the patriots group said in its endorsement, without mentioning any of Radtke’s opponents.

Allen, who has also gotten the backing of some tea party groups in the state, is considered the heavy favorite in Tuesday’s primary.