BAY CITY — The Affordable Care Act was supposed to help families with pre-existing conditions, not hurt them. But that has not been the case for the Davert family. Their health insurance bill has gone up 300 percent and the family is looking at taking out loans and returning to work while on disability to pay the increased costs. The Davert's experience with Obamacare is not just frustrating, it could be dangerous given the medical issues and special needs of the family. "We have such a unique family and we've overcome many obstacles," said Ken Davert, who has cerebral palsy....