Americans are increasingly worried about the cost and quality of medical care that could result from President Obama's effort to revamp healthcare, but a majority still trust him more than Republicans to change the system, a USA Today/Gallup Poll shows. The poll finds that people who fear their costs would increase under the measure jumped 7 percentage points since last month, to 49%. There were similar increases among those who believe that both quality of healthcare and insurance company red tape will get worse if legislation passes.