Trump rejects ex-aide’s claim his White House bid is doomed
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Donald TrumpDonald John TrumpConservatives express concern over House GOP immigration bill Poll: McSally holds 14-point lead in Arizona GOP Senate primary Trump defends Nielsen amid criticism over family separations MORE is rejecting a former political adviser’s assertion that he can't win the White House.

Trump noted that Sam Nunberg, the former aide, was fired. He also claimed Nunberg "makes routine calls begging for his job back."

“Sam Nunberg was fired,” the GOP presidential front-runner said, according to The Daily Beast. “This is the interview of a desperate person who is trying to hang on and stay relevant."

Nunberg predicted Wednesday that Trump is ultimately doomed and will not perform well in early-voting states such as Iowa and New Hampshire.

“Under the scenario I am laying out, I do not think that he will win,” he told The Daily Beast.

“He’s going to lose Iowa. [Ted] Cruz will win Iowa,” Nunberg said. "Some of that support will move over to Cruz in New Hampshire once he loses.

“Once he loses Iowa, he’ll drop [in New Hampshire],” he added. "Once Cruz wins Iowa, and if he beats Trump in New Hampshire, which he very well could, Cruz could win South Carolina, from a momentum perspective.

“[I don’t] see a pathway to the nomination — he certainly won’t be the frontrunner anymore, and his numbers will start to fall.”

Trump’s campaign fired Nunberg last August over social media posts he allegedly made in 2007 and 2008.

He reportedly called President Obama a “Socialist Marxist Islamo Fascist Nazi Appeaser,” as well as both a Kenyan and a Muslim.

Nunberg additionally is accused of using racial epithets against the Rev. Al Sharpton’s daughter. He has since denied that he authored the offensive comments.

The former political adviser on Wednesday said his comments about Trump aren't simply sour grapes.

“Given the time I’ve devoted to him over the years, I’d like to see him at least get the nomination,” said Nunberg, who began consulting Trump as early as 2011.

“What I’m worried about is, I don’t know what his inner circle is telling him. I hope they’re being honest. This is what I would say from a ‘glass half-empty’ perspective if I were talking to Mr. Trump.”

Cruz is ahead of Trump by about 3 points in Iowa, according to the latest RealClearPolitics average of polls.

But Trump leads the GOP field in New Hampshire by nearly 14 points, and he has a 17-point advantage nationally.