The Patient Protection and Affordable Care Act – better known as Obamacare or the Affordable Care Act – was signed into law by President Barack Obama in 2010 . Since then, it has generated enormous amounts of debate, controversy and uncertainty . Yet no one disagrees with the plan’s broad objectives – to make health care more affordable and to include a larger number of Americans under the insurance umbrella. The controversy is over the route to get there. Bruce Broussard, president and CEO of Humana, the fourth-largest health care insurance group, acknowledges that the health care industry has been in a state of flux as the details of the plan – stretching on into 2020 – continue to be ironed out. In an interview with Knowledge at Wharton, he offers his take on Obamacare and the challenges – and opportunities – it presents to health care stakeholders. An edited transcript of the conversation follows.…