Trump closes with a 22 point lead over Haley. DeSantis dropping out was a boon to Trump.
Even if Haley does the impossible in New Hampshire, I'm not sure what the logic is for her campaign. The only reason she's doing relatively well in New Hampshire is because they have an open primary and a lot of undeclared voters that can vote in either primary.
This is the Republican primary, not the general election, so she needs to actually win Republican voters to win the nomination.