I think they're focusing on Romney's background, his style and strategy, and the positions he took earlier in his career.
The problem with the argument is that it wasn't moderates or the Establishment that cost Republicans Senate seats in Missouri or Indiana.
Hello again, FRiend. Can it be established that the RNC offered anything like substantial financial support to Mourdock in Indiana? And Akins in Missouri was excoriated and abandoned for his mistake -- it was the voters, not the Party, who rallied around him.
I realize there was a problem with 'Rat crossovers and secret Trojan support from Claire McCaskill during the Missouri nomination contest (someone explained that McCaskill is basically Satan), but once nominated, he certainly didn't attract support from the Party, especially after he misspoke.