WASHINGTON Most states are lagging when it comes to sign-ups under President Barack Obama's health care law, but an Associated Press analysis of numbers reported Wednesday finds a dozen high-achievers are ahead of the game.

Huge disparities are emerging in how well states are living up to federal enrollment targets. That will help determine whether the White House reaches its goal of having 7 million signed up by the end of March, six weeks away.

Connecticut is the nation's top performer, signing up more than twice the number of residents it had been projected to enroll by the end of January. Massachusetts, which pioneered the approach Obama took in his law, is at the bottom of the list having met 5 percent of its target.

Six Republican-led states Florida, Idaho, Maine, Michigan, North Carolina, and Wisconsin are on pace or better. Residents are signing up despite strong political opposition to the health care law in some of those states.

Surprisingly, the worst performers include four jurisdictions where Obama's law has strong support: Maryland, Massachusetts, Oregon and the District of Columbia.

The administration said Wednesday about 1 million people signed up for private insurance under the health law in January, extending a turnaround from early days when a dysfunctional website frustrated consumers.

January marked the first time since new health insurance markets opened last fall that a national monthly enrollment target was met.

All in all, from Oct. 1 through Feb. 1, nearly 3.3 million people have signed up.

"It's very, very encouraging news," said Health and Human Services Secretary Kathleen Sebelius. "We're seeing a healthy growth in enrollment."

Still, the goal of 7 million by the end of March seems like a stretch.

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Health care law: Most states lag in insurance sign-ups