Our monthly look at who GOP voters prefer as their 2012 nominee finds that Sarah Palin is the most popular potential Republican hopeful with the base...but that she finishes just fourth when it comes to who they want as their nominee. For the first time Newt Gingrich is the leader in this poll with 23%, followed by Mike Huckabee at 21%, Mitt Romney at 19%, Palin at 17%, and Ron Paul at 7%. 70% of Republicans have a favorable opinion of Palin, putting her tops. That's followed by Huckabee at 64%, Gingrich at 63%, and Romney at 59%. But only...