Do I fear her? Sure. But as long as we field a good candidate, she won't win. She will put up a good fight, but she won't win.
I feel that the GOP has learned only Gov's get elected President in the modern era, so we has a list constricted to Governors and former Governors. Here's a list of conservative Govs that can run:
Owens (CO)
Jeb Bush (FL)
Sanford (SC)
Pawlenty (MN)
Riley (AL)
Huckabee (AR)
Kempthorne (ID)
Perry (TX)
-- Only Jeb, Owens, Sanford, and Pawlenty are serious presidential candidates at this point. Perry has enemies in the TX GOP, but Huckabee's popular.
I think the real sleeper, however, is ID Gov. Kempthorne (photo).