Alaska Gov. Sarah Palin made a surprise announcement today: She is resigning from office at the end of the month. Palin didn't explain why she's stepping down now -- throwing into question whether she would seek a run for the White House in 2012. ( See video of Palin's announcement)

The news rattles a Republican Party plagued with setbacks in recent weeks, including extramarital affairs disclosed by two other 2012 presidential prospects, Nevada Sen. John Ensign and South Carolina Gov. Mark Sanford.

We'd like to know your reaction: Could she win the GOP nomination? Would you support her?