No. Mitt Romney has not held any political office during the entire health care debate, so it is impossible for him to have proposed the new health care law.
However, many of the ideas (including the core principles of enforced enrollment and portable insurance) found in the Affordable Care Act were first implemented into law during Romney's term as governor of Massachusetts. He did not, however, originate these ideas, most of which come from several mid-1990s Republican think-tanks, and the actual law passed in Massachusetts was by a Democrat-controlled legislature (though, Romney signed it into law).
Mitt Romney's birth name is Willard Mitt Romney.
Mitt Romney
Mitt Romney's whole name is Willard Mitt Romney.
Mitt Romney's full name is Willard Mitt Romney.
No Mitt Romney has never been registered as a democrat.
Mitt Romney is a Mormon
No, Mitt Romney is not gay.
Mitt Romney is 6'2".
Mitt Romney is American.
Mitt Romney's last name is "Romney".
Mitt Romney's mother's name is Lenore Romney.
No. Mitt Romney worships Jesus Christ.