Eighty percent of likely voters nationwide said they believe the healthcare law would be repealed if Romney wins the White House and Republicans win control of Congress, results of a Rasmussen Reports survey indicated.
A scant 15 percent said they thought repeal would be unlikely.
The Republican-controlled House of Representatives is scheduled to take up repealing the Affordable Care Act this week. Democrats currently control the Senate.
Results are based on a nationwide survey of 1,000 likely voters conducted Thursday and Friday. The margin of error is 3 percentage points.