Compared to a month ago Gingrich is up 13 points, while Cain has dropped by 5 points and Romney has gone down by 4. Although a fair amount of skepticism remains about the recent allegations against Cain there is no doubt they are taking a toll on his image- his net favorability is down 25 points over the last month from +51 (66/15) to only +26 (57/31). What is perhaps a little more surprising is that Romney’s favorability is at a 6 month low in our polling too with only 48% of voters seeing him favorably to 39% with a negative opinion.

Gingrich’s lead caps an amazing comeback he’s made over the last 5 months. In June his favorability nationally with Republican voters plummeted all the way to 36/49. Now he’s at 68/23, representing a 58 point improvement in his spread since then. As recently as August Gingrich was mired in single digits at 7%, and even in September he was at just 10%. He’s climbed 18 points in less than 2 months.

There’s reason to think that if Cain continues to fade, Gingrich will continue to gain. Among Cain’s supporters 73% have a favorable opinion of Gingrich to only 21% with a negative one. That compares to a 33/55 spread for Romney with Cain voters and a 32/53 one for Perry. They like Gingrich a whole lot more than they do the other serious candidates in the race.