MANCHESTER, N.H. - The polls have started to close in swing state New Hampshire as Democratic and Republican Senate nominations are up for grabs on Tuesday, in a race that may determine if Republicans keep control of the chamber in the midterm elections.Socialist-aligned candidate Karishma Manzur is on the move as she tries to pull off a major upset and defeat establishment-backed four-term Rep. Chris Pappas in the Democratic Senate primary.Once a longshot, Manzur gained momentum in recent weeks as the national spotlight turned to New Hampshire after a six-month primary season that saw the far...