Herman Cain is getting pretty close to being something more than the flavor of the month. PPP's newest polls find him with a double digit lead in Wisconsin, and running only a point behind Mitt Romney in Nevada. This now makes 4 weeks in a row where Cain's been on the top of our polls- in 9 surveys we've conducted over that period of time he's held the lead in 8 with this Nevada poll serving as the only exception.
In Wisconsin Cain's at 30% to 18% for Romney, 12% each for Newt Gingrich and Rick Perry, 8% for Ron Paul, 5% for Michele Bachmann, 2% for Rick Santorum, and 1% each for Jon Huntsman and Gary Johnson.
In Nevada Romney's at 29% to 28% for Cain, 15% for Gingrich, 7% for Paul, 6% for Perry, 3% for Bachmann, 2% for Santorum and Huntsman, and 0% for Johnson.

Cain's numbers continue to represent a huge amount of momentum. He's gained 21 points from late July in Nevada, when he was at 7%. And he's gained 23 points from mid-August in Wisconsin where he was also at 7%. It's the Tea Party that continues to drive Cain's support. He's up 37-19 on Romney with those voters in Nevada with Gingrich in second at 20%. And in Wisconsin he gets 37% with them as well with Gingrich at 17%, Perry at 12%, and Romney all the way back in a tie for 4th with Ron Paul at 8%.
One thing that does remain a problem for Cain is that his voters are not strongly committed- only 41% in Nevada say that they'll definitely vote for him, compared to 59% of Romney's supporters who say they're all in. And in Wisconsin just 29% of his voters say they're firmly in his camp compared to 34% for Romney. Cain's support is broad at this point- but it's not deep.