President Barack Obama called the cost of healthcare a "ticking time-bomb" that threatens to slow the nation's path to prosperity, as he pushed a massive reform plan during an appearance before the American Medical Association. "We are spending over $2 trillion a year on healthcare—almost 50% more per person than the next most costly nation," he said during a nearly hour-long speech before the doctors' group. "For all this spending, more of our citizens are uninsured, the quality of our care is often lower and we aren't any healthier."