Three new polls out show Hillary Clinton maintaining or widening her lead against Barack Obama in anticipation of the Pennsylvania primary tomorrow.Survey USA has Clinton leading by six points 50-44. This is down from a 14 point lead earlier. The Quinnipiac poll has Hillary up 7 51-44 while the Suffolk University poll has it 52-42 Clinton.The significance here is that first of all, Hillary has cracked the all important 50% mark in all three polls - a gauge that pollsters use to measure strength. But there is potential trouble for Clinton in the numbers detailing the white vote. Hillary needs a large turnout of whites and needs to win at least 58% - 60% of them to score a double digit win. This excellent analysis at Talk Left explains her problem:Projecting the undecideds gets me to 54-46 Clinton. If Obama can capture 40% of the white vote, as Q seems to predict (and one assumes SUSA as well), then he can keep it under double digits. That is the mystery in PA today. What will...(Read Full Post)