BRISBANE, Australia — President Barack Obama denied Sunday that his signature health care reform law was deceptively marketed, rejecting statements by a consultant on the plan who said aspects of Obamacare were designed to take advantage of the “stupidity” of voters. “The fact that an adviser who was never on our staff expressed an opinion that I completely disagree with in terms of the voters is not a reflection on the actual process that was run,” Obama declared at a press conference here, speaking for the first time about the comments by MIT economist Jonathan Gruber.When the president was asked...