Donald Trump: My Tax Plan ‘Will Be A Rocket Ship For The Economy’ | Video

Speaking to Matt Lauer by telephone, Donald Trump touted “tremendous reviews” for his tax plan and said it will stimulate the economy and that the middle class would be the biggest beneficiaries of it. Addressing the crisis in Syria, he said that the U.S. should encourage Russia to fight ISIS. “I’m leading every single poll,” he said regarding the presidential race. “So far it’s looking good.”

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With summer over, so might be the "Summer of Trump" -- and now the man himself appears to be accepting it might not be a kind Fall.

“This is going to be an ebb and flow, how can I continue to lead by such wide margins?,” Donald Trump told NBC’s “Today Show” this morning.

The GOP front-runner's once dominant lead in the polls has been shifting. A new Wall Street Journal/NBC News poll this week shows the real estate mogul now in a virtual tie with retired neurosurgeon Ben Carson, polling at 21 percent to Carson’s 20.