NEW HAMPSHIRE 2020: Sanders jumps to lead, BUttigieg surges While Warren and Biden slip (Emerson)

[still_one]

30. NH a very volatile state, and when the poll includes republicans, indicates that 45% could change

their minds, 14% are undecided, and their partially open primary means that anyone before the primary election, can change their registration to no party preference, and then that group can choose which primary they want to participate in

"the New Hampshire primary is not a "closed primary," where voter participation is limited by voters' past or recent party registration. Instead, New Hampshire enables any voter who has been undeclared, or re-registers as undeclared (not registered with any party) to vote in either party's primary. This seemingly technical distinction can have big impacts on the primary, and how fluidly candidates do in the state (especially if only one party has a competitive primary in a given year, eliciting a greater likelihood that undeclared or less partisan voters will flood that party's primary, if they want to participate at all.) This system is not a fully open primary, because people who are registered with a party (Republican or Democratic) on voting day cannot vote in the other party's primary."


https://en.wikipedia.org/wiki/New_Hampshire_primary

To demonstrate the point:

"Hillary Clinton managed an upset win over Barack Obama in New Hampshire, despite polls showing her as much as 13 points behind in the run-up to the vote.[20] The win helped Clinton get back some of the momentum she lost the week before when Obama carried the Iowa caucuses—though Obama did eventually win the Democratic nomination. John McCain won the Republican primary, sparking an unexpected comeback for the senator whose long-shot campaign had been written off as a lost cause months before."