The Democratic Senatorial Campaign Committee has been talking up the prospects of businesswoman Nan Stockholm Walden (D) getting into the race against Sen. John McCain (R-Ariz.).

It's a testament to how vulnerable McCain is perceived to be by Washington Democrats when a woman with virtually zero name recognition in Arizona, let alone nationally, would be considered to have a chance of beating the four-term incumbent.

Alas, the Walden-McCain match-up will have to wait for another cycle. She announced Tuesday she won’t run for the seat.

"After thoughtful and prayerful consideration, I have decided that the time is not right to enter this Senate race," Walden said in a statement issued originally to the Tucson Sentinel. "Dick and I are partners in our family enterprise, and are in the midst of a number of important initiatives for our town, our county and our state. I cannot abandon these obligations to our family, our partners, our 60-year-old farming business, our 250 employees and our Santa Cruz Valley."

The equation for Democrats may change if former Rep. J.D. Hayworth (R-Ariz.) wins the GOP primary, but in the meantime it's wait and see.

Updated at 6:09 p.m.