Baloney, Romney just got lessons from Obama on how you ignore and bypass the checks and balances....also ignoring any outcry from congress.
So no....Romney will do what he wants...and that is bringing on Obamacare under his name....giving gays what they shout for, and leaving the decision of abortion to woman.
Defy the Living God if you want but I wouldn't advise it.
Otherwise, as happened to Ford in 1976 and Bush in 1996, conservatives back a primary challenger and, even though you win renomination, you are weakened and end up defeated for reelection.
A President Romney would be subject to the same political calculus.