Associated Press

Democratic presidential candidate Hillary Rodham Clinton rejoins the health care debate in earnest Monday with a plan to expand coverage. Positions of other presidential candidates:

Illinois Sen. Barack Obama: Require employers to share costs of insuring workers and ensure all children are covered. Offer coverage similar to that in plan for federal employees. Says package would cost up to $65 billion a year after unspecified savings from making system more efficient. Raise taxes to pay the cost.

Delaware Sen. Joe Biden: Expand health insurance to cover all children and to make catastrophic care available for all; look to states for ideas on moving toward universal coverage.

Connecticut Sen. Chris Dodd: Expand coverage by offering insurance that could be taken from job to job, with premiums based on ability to pay. No cost estimates offered for plan. Offer coverage similar to that in plan for federal employees.

Former North Carolina Sen. John Edwards: Achieve mandatory universal coverage by 2012 with a system of expanded federal health insurance, family tax credits and coverage requirements on employers, insurance companies and individuals. Increase taxes to pay for program's cost of up to $120 billion a year.

Ohio Rep. Dennis Kucinich: Favors national health insurance program covering medical, dental, mental health and long-term care for all, as well as prescription drugs. "My plan doesn't provide for a role for for-profit insurance companies."

New Mexico Gov. Bill Richardson: Tax breaks for businesses and for people who pay for their own coverage. Lower the eligibility age for Medicare to 55 and expand programs for poor and children. Package could cost up to $110 billion a year. Would seek savings in medical care by expanding spending on preventive care.