What's the Political Power of ACA's Newly Insured?

An estimated 17 million uninsured have been covered by the Affordable Care Act. As that number grows in the coming years, it could have political implications: How will the newly insured behave at the ballot box? Will they vote? Will they become a Democratic constituency? The ACA may be an issue in the 2016 elections, but the newly insured are unlikely to become an important electoral factor themselves.