I know most Republicans don't want to hear this but when you compare Scott Brown's fate in Massachusetts earlier this year with Tim Burns' in PA-12 this week it shows the contrast between GOP candidates who can appeal to the middle and those who can't.
Scott Brown had a 2:1 positive favorability ratio with moderates on our final Massachusetts poll, at 62/31. That allowed him to win moderate voters 55-41 in our polling.
Tim Burns had a 2:1 negative favorability ratio with moderates on our last PA-12 poll, 27/52. And Mark Critz absolutely swamped Burns with those folks, leading 67-27.
PA-12 is a lot more conservative than Massachusetts but that doesn't change the fact that the GOP can't win elections if it doesn't have more appeal to the middle. Republican voters are failing to learn from their own successes by nominating the most strident candidates possible instead of folks like Brown who have shown the ability to expand their support beyond the party base.