Has a Mitt Romney surge begun in Michigan? A week ago, PPP had Rick Santorum up by fifteen points in Romney’s home state. In their new poll, PPP puts Romney back only four — although Santorum hasn’t actually lost any support: The Republican race for President in Michigan has tightened considerably over the last week, with what was a 15 point lead for Rick Santorum down to 4. He leads with 37% to 33% for Mitt Romney, 15% for Ron Paul, and 10% for Newt Gingrich. The tightening over the last week is much more a function of Romney gaining...