New Hampshire Republican governor Chris Sununu, Democratic senators Maggie Hassan and Jeanne Shaheen, and the state legislature vowed to continue holding the "first-in-the-nation" primary (as New Hampshire state law establishes)[3] and ultimately did set an earlier date of January 23.

The primary was won by Donald Trump, defeating Nikki Haley by eleven points.

[70][user-generated source] A rural New England state with a libertarian streak dominated by moderate voters, New Hampshire had backed Republicans in most presidential elections since the party's formation up until 1988, except for Woodrow Wilson in 1912 and 1916; Franklin D. Roosevelt in 1936, 1940 and 1944; and Lyndon B. Johnson in 1964.

[71] By tradition, since 1960, all eligible voters of Dixville Notch, New Hampshire cast their votes at midnight on Election Day.

[72] He nonetheless became the first Republican to win the White House without carrying Hillsborough County since Richard Nixon in 1968.

Notably, Republicans won the open governor race, as well as expanded their majorities in the state legislature on the same ballot.

Donald Trump flipped the following towns that voted for Joe Biden, were tied, or recorded no votes in 2020:[73][74] Acworth, Berlin, Claremont, Francestown, Freedom, Greenfield, Hart's Location, Jaffrey, Langdon, Littleton, Lyndeborough, Martin's Location, Nottingham, Pembroke, Shelburne, Springfield, Stratford, Sullivan, Swanzey, Tamworth, and Temple.