He won more than 50% of the vote, although his margin of victory decreased significantly from the primary in 2016, when he won New Hampshire by about 20 points over a crowded field. And he fell far short of his 30-point triumph in this month’s Iowa caucuses.

He seemed visibly aware of that fact when he took the stage Tuesday night, and signaled an uglier next phase.

Using an expletive as he repeatedly attacked Haley, he said, “I don’t get too angry — I get even.”

[...]

Despite his robust showing, the results offered warning signs for Trump before November.

A significant slice of Haley’s support came from unaffiliated voters who wanted to send a message about stopping Trump — a reminder that he owns Republicans, but doesn’t own everybody else.

[...]

only about half of those who voted in the New Hampshire primary said they would consider him fit for the presidency if he were convicted of a crime, according to CNN exit polling. Those who might not vote for him with a criminal conviction, assuming a trial takes place this year, remain a minority. But in a close fall campaign, such factors could matter.