Sherie Luffman has been without health insurance for the past seven years. “I had to cancel it because I couldn’t afford $750 a month in insurance premiums, and I’m more than two years away from qualifying for Medicare,” said Luffman, first vice chairwoman of the Whitfield County Democratic Party. “I’m really looking forward to the Affordable Care Act taking effect. I’ll be able to buy insurance on the health care exchange. I’ll qualify for federal assistance to help pay my premiums. I’ll be able to go to the doctor when I get sick instead of waiting to see if I...