The Obama White House is confident its sweeping, controversial health care law will pass the highest legal test in the United States, officials said Monday.

"We know the Affordable Care Act is constitutional and are confident the Supreme Court will agree," White House Communications Director Dan Pfeiffer said in a statement after the Supreme Court announced it would consider challenges to President Obama's ‘Affordable Care Act.'

The White House, Congressional leaders and the ACA's opponents have engaged in political and legal battles over the law from the outset of its passage.

One of the main sticking points has been the individual coverage mandate, which states that every American must have health insurance. Ohio voters recently rejected the idea, passing a ballot measure by a vote of 66% to 34%, which amends the state's Constitution to bar laws requiring a person to purchase health insurance.

Monday, administration officials cited a CNN poll showing Americans are coming around on the idea of a mandate.

The poll indicates 52% of Americans favor mandatory health insurance, up from 44% in June. The study also finds that 47% oppose the health insurance mandate, down from 54%in early summer.

The president and his staff have repeatedly expressed confidence that the law will pass the necessary legal tests, allowing it to be fully implemented. There have been many challenges, with mixed results.The administration is now looking to the Supreme Court for the final word.

"Earlier this year, the Obama Administration asked the Supreme Court to consider legal challenges to the health reform law and we are pleased the Court has agreed to hear this case," Pfeiffer said. "Thanks to the Affordable Care Act, one million more young Americans have health insurance, women are getting mammograms and preventive services without paying an extra penny out of their own pocket and insurance companies have to spend more of your premiums on health care instead of advertising and bonuses."