Posted:Today Updated: 12:37 AM President Obama and Mitt Romney both make arguments -- likely to continue until November -- based on suspect data.

By CALVIN WOODWARD and RICARDO ALONSO-ZALDIVAR/The Associated Press

WASHINGTON President Obama promises nothing will change for people who like their health coverage, except it'll become more affordable, but the facts don't back him up. Mitt Romney groundlessly calls the health care law a slayer of jobs certain to deepen the national debt.

Welcome to the health care debate 2.0. As the claims fly, buyer beware.

After the Supreme Court upheld the law last week, Obama stepped forward to tell Americans what good will come from it. Romney was quick to lay out the harm. But some of the evidence they gave to the court of public opinion was suspect.

A look at their claims and how they compare with the facts:

OBAMA: "If you're one of the more than 250 million Americans who already have health insurance, you will keep your health insurance. This law will only make it more secure and more affordable."

ROMNEY: "Obamacare also means that for up to 20 million Americans, they will lose the insurance they currently have, the insurance that they like and they want to keep."

THE FACTS: Nothing in the law ensures that people happy with their policies now can keep them. Employers will continue to have the right to modify coverage or even drop it, and some are expected to do so as more insurance alternatives become available to the population under the law. Nor is there any guarantee that coverage will become cheaper, despite the subsidies many people will get.

Americans may well end up feeling more secure about their ability to obtain and keep coverage once insurance companies can no longer deny, terminate or charge more for coverage for those in poor health. But particular health insurance plans will have no guarantee of ironclad security. Much can change, including the cost.

Continued here:

Checking facts on opposing claims about health care law