DURHAM, N.H. —As Donald Trump prepares to accept the Republican Party’s presidential nomination in Cleveland on Thursday night, a new poll show that he is now deadlocked with Democrat Hillary Clinton in a one-on-one matchup in the battleground state of New Hampshire. The Granite State has only four electoral votes, but it is considered a swing state, and as such, it is closely watched and highly coveted in general election campaigns. The latest WMUR Granite State Poll, released on Thursday evening, has Clinton leading Trump, 39 percent to 37 percent, well within the poll’s 4.5 percent margin of error, while...