Three September debates have shaken-up the race for the Republican presidential nomination. Herman Cain has jumped into the top tier. Rick Perry’s stumbled. Mitt Romney's holding steady.

And Michele Bachmann is hitting bottom. That’s according to a Fox News poll released Wednesday.

The new poll found Cain’s support has nearly tripled among GOP primary voters to 17 percent.

That’s up from 6 percent before this month’s debates, and puts him in what is essentially a three-way tie with Perry and Romney.

Cain has benefited not only from his debate performances, but also significant media attention after winning the Florida Republican Party’s straw poll on Saturday.

Perry now garners 19 percent, a drop of 10 percentage points from a month ago. That puts Romney back in the top spot with the support of 23 percent. Last month Romney was at 22 percent...