Santorum accuses Romney, Huntsman of 'weakness'

Santorum took a shot at both the former Massachusetts governor and the former Utah governor, each of whom have avoided the Hawkeye State and spent more of their time in New Hampshire and subsequent primary states.

"I think it's a big mistake for any candidate to bypass Iowa. It shows weakness, not strength," said Santorum, who's hoping to contend in Iowa, during an appearance on CNBC.