Two Democratic sources tell TPM that their exit poll data shows Sen. Russ Feingold (D-WI) either tied with or down by the thinnest of margins against his Republican challenger Ron Johnson.
A senior Dem source says one exit poll has them down by a point. The other has it dead even.
Customary notes of caution about exit polls apply, and, of course, these are Democratic sources pulling for their candidate. But the early data is clearly closer than they expected they would be.
Brian Beutler is TPM's senior congressional reporter. Since 2009, he's led coverage of health care reform, Wall Street reform, taxes, the GOP budget, the government shutdown fight, and the debt limit fight. He can be reached at firstname.lastname@example.org.