GOP ponders whether Donald Trump helps sell health care

It was a platform most politicians can only hope for: A captivated, 6,000-person crowd and more than an hour of live, prime-time television coverage to hype the Republican vision for a new health care system. But when President Donald Trump got around to talking about the Republican plan — about 15 minutes into his speech — he was wildly off message. Instead of preaching party lines about getting the government out of Americans’ health decisions and cutting costs, he declared: “Add some…