“Any strategic change by Trump in New Hampshire would be an admission that he did something wrong in Iowa,” said Jim Dornan, a Republican operative and former Trump adviser. “The Donald Trump I observed would never admit that.”

According to veteran Republican pollster Tony Fabrizio, the Iowa caucuses held several avoidable disappointments for Trump. “If I were Trump’s folks and looked through the entrance poll data I would commit SUICIDE,” he wrote in an email.

Fabrizio cited entrance poll data — now adjusted to reflect vote totals — showing that Trump had lost Iowa caucus-goers who are concerned about government spending to Cruz, 27 percent to 19 percent, as well as those who are angry at the federal government by a narrower margin.

Fabrizio also cited results showing Rubio winning 30 percent of caucus-goers concerned about the economy to Trump’s 24 percent. “Losing economic voters to Rubio is a joke,” he wrote.