WASHINGTON — In a victory for President Obama, the Democratic-controlled House narrowly passed landmark health care legislation Saturday night to expand coverage to tens of millions who lack it and place tough new restrictions on the insurance industry. Republican opposition was nearly unanimous.

The 220-215 vote cleared the way for the Senate to begin debate on the issue that has come to overshadow all others in Congress.

A triumphant Speaker Nancy Pelosi likened the legislation to the passage of Social Security in 1935 and Medicare 30 years later.

"It provides coverage for 96 percent of Americans. It offers everyone, regardless of health or income, the peace of mind that comes from knowing they will have access to affordable health care when they need it," said Rep. John Dingell, the 83-year-old Michigan lawmaker who has introduced national health insurance in every Congress since succeeding his father in 1955.