Key swing state voters to settle dueling Senate primary fights in crucial open-seat race

MANCHESTER, N.H. - The Democratic and Republican Senate nominations are up for grabs on Tuesday in swing state New Hampshire, 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...