Granite State Democrats desperately want to pick a candidate who can beat Trump, but they’re not sure anyone on the primary ballot can do it. MANCHESTER, New Hampshire — It would be easy to mistake the feverish activity in New Hampshire over the past week for excitement. The state has been abuzz with Democratic presidential campaign events, armies of canvassers knocking on doors, curious voters from neighboring states coming to get a look at the candidates, and here in Manchester, swarms of reporters and camera crews.But when you talk to voters, the overarching feeling isn’t excitement or optimism, but anxiety....