Oh, and to heap up the insults, he quotes John Adams to support himself:

There are some who may feel that religion is not a matter to be seriously considered in the context of the weighty threats that face us. If so, they are at odds with the nation’s founders…. In John Adams’ words: ‘We have no government armed with power capable of contending with human passions unbridled by morality and religion… Our constitution was made for a moral and religious people.’

Of course, before you make an appeal to authority, you ought to check that the authority actually agrees with you. Here are a few more Adams quotes:

The United States of America have exhibited, perhaps, the first example of governments erected on the simple principles of nature… [In] the formation of the American governments … it will never be pretended that any persons employed in that service had interviews with the gods, or were in any degree under the influence of heaven…. These governments were contrived merely by the use of reason and the senses. – A Defense of the Constitutions of Government of the United States of America

As I understand the Christian religion, it was, and is, a revelation. But how has it happened that millions of fables, tales, legends, have been blended with both Jewish and Christian revelation that have made them the most bloody religion that ever existed? – letter to F.A. Van der Kamp, December 27, 1816

Adams, like Jefferson, was a deist who rejected the divinity of Jesus. He’d certainly be no fan of Mr Romney, and he’d unquestionably be one of those "secularists" that Romney’s trying to distance himself from.