Resolving their own differences will be a tall order for congressional Democrats trying to deliver on President Barack Obama's signature issue, the health care overhaul.

And there will be gaps for consumers, since the Democratic measures would leave 12 million or more eligible Americans uninsured. Premiums could still be a stretch for many, even with government aid. And a new federal fund to provide temporary coverage for people with health problems would quickly run out of cash.

But before there is any White House signing ceremony, differences must be resolved on abortion, taxes and the so-called public option.

Full Senate debate begins after Thanksgiving and moderate Democrats have threatened to scuttle the bill if it contains a government insurance plan. And the House version has stricter bans on abortion funding than the Senate measure.

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