Three months after signing health care reform into law, President Barack Obama is still defending the landmark legislation as Republicans work to repeal it.

"We're not going back," Obama said of the opposition Tuesday. "I refuse to go back and so do countless Americans."

Obama unveiled new regulations that will determine how several provisions in the health care law will be carried out, including a ban on insurers denying coverage to children in poor health.

The "Patient Bill of Rights" will prevent excluding coverage to children with pre-existing conditions, protect patients' choice of doctors, prevent maximum limits on coverage,and require insurance premium hikes to be reviewed before they are enforced.

While many Republicans agree with some of the consumer protections, other GOP leaders brushed the new rules aside as a mere publicity stunt by the White House.

"This shouldn't be called a health care bill of rights, but a bill of goods that the American people aren't buying," said Sen. Orrin Hatch, R-Utah. "There isn't enough slick advertising, politically crafted events, or artful sales pitches that will change that."

Recent polls show Americans are still split on the health care law. The regulations announced Tuesday apply to most health plans renewing on or after Sept. 23.