WASHINGTON – Covering all the bases ahead of a momentous Supreme Court ruling, the Obama administration plans to move ahead with major parts of the president's health care law if its most controversial provision does not survive, according to veteran Democrats closely involved with the legislation.

Even if the requirement that nearly every U.S. resident have health insurance is declared unconstitutional, the remaining parts of the law would have far-reaching impact, putting coverage within reach of millions of uninsured people, laying new obligations on insurers and employers, and improving Medicare benefits even as payments to many service providers get scaled back.

The White House says President Barack Obama is confident the whole law will be upheld when the court issues its ruling in the next week or two, but officials will be ready for any outcome.