The second year of open enrollment for the Affordable Care Act is now underway. This year, more insurers are participating in health insurance marketplaces, and if evidence from last year is any indication, increased competition should result in lower premiums.

By Simone Pathe

On the day the health insurance marketplace opens, Paul Solman speaks with Jon Gruber about the origins of the health care reform law, and the Heritage Foundation responds. Image courtesy of Lilli Day via Getty Images. On a recent shoot…