The controversial moment occurred the same day Trump ripped fellow 2016 candidate Jeb Bush for referring to Asian "anchor babies."

"Negotiating with Japan, negotiating with China, when these people walk into the room, they don't say, 'Oh hello, how's the weather, so beautiful outside, isn't it lovely? How are the Yankees doing? Oh they are doing wonderful, great,' " Trump told supporters in Dubuque, Iowa.

"They say, 'We want deal.'"

.@realDonaldTrump on what he expects to hear when negotiating with China: “We want deal!” #2016 #GOP http://t.co/eeOZPEwyjX — The Last Word (@TheLastWord) August 26, 2015

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He went on to pan Bush and Hillary Clinton, asking the crowd which one of the three White House candidates they would want negotiating a deal.

The comments come after he panned Bush on Twitter for a "clumsy move" on immigration.

Bush, who previously defended his use of the term “anchor babies” after criticism, said Monday that his use of the phrase applied more to illegal businesses that aim to woo pregnant Chinese immigrants into the United States so that their children could be born as American citizens, and not as much to Hispanic immigrants.

“What I’m talking about is the specific case of fraud being committed where there’s organized efforts — frankly, it’s more related to Asian people — coming into our country, having children in that organized effort, taking advantage of that noble concept, which is birthright citizenship," he said Monday in Texas.