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.