Two more prominent conservatives have gone public with the increasingly familiar view that Sarah Palin simply cannot win the presidency in 2012. The last few weeks have been very tough for Palin, with more and more conservatives voicing doubts about her fitness to be president (see Salon's guide to the criticism here) and her poll numbers dropping. The two latest doubters are columnist George Will and the RedState blogger Erick Erickson. They take two different routes to the same conclusion. Here's Erickson in a blog post today endorsing Rep. Mike Pence for 2012: But right now I am not excited...