Hopes and fears as sign-up season opens for second year of health law's insurance markets

The second sign-up season under President Barack Obama's health overhaul opens Saturday, and the hope is that consumers will have a positive experience this time.

The fear is that entrenched political opposition and renewed legal challenges could yet collapse the program.

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With 7 million paying customers in new insurance markets, the Affordable Care Act is helping to reduce the number of uninsured Americans.

But "Obamacare" is struggling to win hearts and minds. The latest Associated Press-GfK poll finds that, if forced to choose between repealing the law and implementing it, 56 percent of Americans would repeal it. Only 41 percent would carry it out.

However, most don't see the law going away.