Mitt Romney climbs aboard the "OMG, Obama Just Gave Away Missile Defense" train:

The president's New Strategic Arms Reduction Treaty (New-START) with Russia could be his worst foreign policy mistake yet. The treaty as submitted to the Senate should not be ratified. New-START impedes missile defense, our protection from nuclear-proliferating rogue states such as Iran and North Korea. Its preamble links strategic defense with strategic arsenal. It explicitly forbids the United States from converting intercontinental ballistic missile (ICBM) silos into missile defense sites.

Paul Podvig hacks through Romney's jungle of errors and misrepresentations here. I must say, Mr. Podvig was much nicer than I would have been.