Mitt Romney's changing positions on gay rights have been slammed by President Obama strategist David Axelrod.

Axelrod made his comments during an interview broadcast Sunday on ABC's This Week.

When host Christiane Amanpour asked Axelrod whether he believes Romney will be the GOP nominee to face Obama in 2012, Axelrod answered that the Romney campaign appears to be stuck in neutral.

“I really don't know. There was a poll out this week that showed him at the same 23 percent he's been throughout the race. Now Herman Cain is leading the primary. The last poll Rick Perry was leading it. Earlier Michele Bachmann was doing very well. But Romney stays the same.”

“Why? Because I think there is this question about what his core principles are,” Axelrod said.

Citing Romney's positions from when he was running for U.S. Senate and Massachusetts governor, Axelrod said that Romney is too willing to shift for political gain.

“Then he was a pro choice, pro gay rights, pro environmental candidate for office. Then he decided to run for president. Did a 180 on all of that.”

“So time and time and time again he shifts – and you get the feeling that there is no principle too large for him to throw over in pursuit of political office.”

“If I were Governor Romney, I'd be worried about all these changes in position and … what kind of message that sends to voters,” Axelrod added. (The video is embedded in the right panel of this page.)