Ayotte or Craig will replace Republican Chris Sununu, who announced last year that he would not be seeking reelection. Sununu has been in office since 2016, serving four two-year terms. Before announcing he would not seek reelection, Sununu considered becoming a candidate for president, but he eventually decided not to run.

The New Hampshire governor's race comes down to one candidate who is trying to jump from local to statewide office and another who wants to bring federal experience to the Statehouse.

Kelly Ayotte and Joyce Craig are locked in NH governor's race that is closest in the nation. Here are 6 key issues that could prove decisive.