Just 29 percent in the state approve of Christie's performance.
"What Chris Christie did was an in-kind contribution to the Democrat Party," Gowdy said.
Sixty-five percent voted for other candidates in the New Hampshire primary, after all.
Trump did not directly answer a question about an endorsement.
He seems headed toward a disappointing sixth place finish in New Hampshire.
Rep. Darrell Issa (R-Calif.) went after Chris Christie on the eve of the New Hampshire primary...
“You can’t trust Senator Rubio to be the nominee of this party," Christie said.
"He's a good guy but he is not ready to be president of the United States."
They slammed him on foreign policy, immigration and infrastructure.
He said he didn't want to pursue a bill he knew wouldn't pass.
Candidates are hoping to make a final impression just days before New Hampshire votes.
"All the rest of us will be there to welcome him with open arms," he said.
The nominating process for both parties is fundamentally flawed.
The move comes after a disappointing finish in the New Hampshire primary.
Murdoch said Christie blew himself up while damaging Rubio.
The result is just about the worst possible one from the establishment’s perspective.
Surprising finishes in New Hampshire could elevate them to the stage.
“I don’t think there’s anybody ... who think he’s the most electable now," Christie said.
"ObamaCare was not an accident. Dodd-Frank was not an accident."
Trump has 33 percent of support of likely Republican primary voters.
Rubio pledges to make "the issue of life" a major general-election topic.
Christie mocked Rubio's speaking style; Rubio responded by attacking Christie's character.
Four key storylines, from the return of Trump to the "dirty tricks" debate.
Jeb Bush, John Kasich and Chris Christie are fighting to keep their campaigns alive.