Giving up?

DSCC, via Kos:

According to publicly available reports, Rick Santorum is now 100% dark in Pennsylvania, having paid for no campaign ads today. Santorum has spent more than $9 million on ads so far, but his latest media buy ended last night. Since national Republicans aren't airing independent ads in Pennsylvania, that means nobody will be on the air on Santorum's behalf until Santorum himself pays to go back on. So far, Santorum has yet to reserve ad time for the final two weeks of the campaign.

See ya on K Street, Ricky. Oops, belay that.