The same likely goes for another potential GOP candidate, Jon Huntsman Jr., the U.S. ambassador to China and a former Utah governor.
Both Romney and Huntsman have made statements recently suggesting their Mormonism will not be accepted by everyone.
In Romney's case, his advisers are acknowledging they learned in his 2008 race for the White House that his LDS faith is an impossible sell to some voters.
Should the former Utah Olympic leader make another bid for the presidency, he won't be trying to woo the largely evangelical wing of the party that doesn't accept Mormons as Christians.
"There are just some people for whom it will not be settled," Romney recently told the Boston Globe. "That's just the nature of who we are as a people. A lot of people have differing views."
Huntsman, seen as a less-likely candidate after his appointment by Democratic President Barack Obama last year, appears to be taking a different tack.