(CNN) - Gov. Mitch Daniels of Indiana became the latest establishment Republican to back all-but-declared GOP presidential nominee Mitt Romney.
"He's already won our nomination, he earned it," Daniels said on Fox News Wednesday. "He's proven himself the best nominee we can put forward, and I'm just happy to sign on and help."
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The second-term governor who weighed his own presidential bid earlier in the cycle, said he wrote to Romney "the other day," offering his political services to the former Massachusetts governor.
In a statement released Wednesday, Romney said Daniels shares his background in business and has "used the principles of the private sector in government."
"Indiana has been served well by his leadership based on fiscal discipline, smaller government, and a friendly environment for job creators," Romney said. "I am honored to have his support."
However, Daniels once again pushed back on the suggestion he might serve as Romney's No. 2 on the Republican ticket in November.
"Well it won't happen so we won't take the audience's time with it, but I'll be glad to be a No. 22 or wherever I can fit in in terms of supporting a winning campaign," Daniels said.