dan quayle getty Dan Quayle endorsing Mitt Romney, says AP sourceFormer Vice President Day Quayle is throwing his support behind presidential candidate Mitt Romney, reports the AP. Republican officials told the AP that Quayle plans to announce Tuesday (Dec. 6) when Romney is in Arizona.

Romney has an event scheduled Tuesday for Paradise Valley, Ariz, which is where Quayle has one of his homes. A GOP official close to Quayle says that Quayle is backing Romney because he sees Romney as the most credible candidate.

This GOP official spoke to the AP under the condition of anonymity, since he was speaking ahead of the official announcement. Quayle served as vice president under President George H.W. Bush and prior to that served as a representative in Congress and senator in the U.S. Senate.

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