Second choice of Gingrich voters:
Huckabee 31%
Romney 27%
Palin 19%
Paul 9%
Second choice of Huckabee supporters:
Palin 34%
Gingrich 19%
Romney 17%
Pawlenty 7%
Second choice of Palin supporters:
Huckabee 24%
Gingrich 20%
Romney 12%
Paul 10%
Second choice of Romney supporters:
Palin 27%
Huckabee 23%
Gingrich 14%
Paul 6%
(Palin supporters seem to be the most likely to get confused by the quesiton, and say that Palin is both their first and second choice. 18% of Palin voters said that she was both their first and second choice.)
Leading second choice of other cadidates:
Romney supporters seem to give other candidates the lowest marks. Huck and Palin both have a 46% favorable rating among Romney voters. Gingrich has a 41% favorable rating among Romney voters. In most other cases, supporters of one candidate tend to give competing candidates favorable ratings of over 50%. Though Romney has just a 40% favorable rating among Palin voters.
PPP's take:
http://publicpolicypolling.blogspot.com/2010/11/going-deep-on-republicans.html