Craig is not happy with how the Romney campaign treated him.
WASHINGTON (CNN) – Sen. Larry Craig, the Idaho Republican caught in a Minneapolis bathroom sex sting this summer, said presidential candidate Mitt Romney "threw me under the campaign bus" when news of his arrest came out.
"He not only threw me under his campaign bus, he backed up and ran over me again," Craig told NBC's Matt Lauer in an interview set to air later this week on the "Today" show.
Romney, the former governor of Massachusetts, said Craig's behavior was "disgraceful" and called for Craig's resignation when news of the senator’s arrest came out at the end of August. (Ticker: Romney: Craig has to look at his conscience)
Craig was Romney's Senate liaison before resigning from the campaign.
Romney spokesman Kevin Madden defended the presidential candidate's response. "Governor Romney simply believes that a public office is a public trust," Madden said. "He believes when a public official enters a guilty plea, they have broken that public trust and should step aside for the sake of their constituents."
Related: Sen. Craig says he'll appeal
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– CNN's Scott Anderson and Alexander Mooney