Republican presidential candidate Donald Trump speaks to a crowd during his "Make America Great Again Rally," at the Grand River Center in Dubuque, Iowa, Aug. 25, 2015. Reuters/Ben Brewer

Complaints that Donald Trump, the Republican presidential nomination front-runner, resorts to thinly veiled racism to whip up GOP support aren't likely to go away in light of racially insensitive remarks the candidate delivered Tuesday. During a campaign rally in Dubuque, Iowa, Trump took a jab at Asia by mocking Chinese and Japanese "business styles," the South China Morning Post reported.

Trump, who frequently blasts China for its trade relationship with the U.S., tried to do an impression of Asian business partners -- in broken English -- as a critique of those who dispense with pleasantries and bluntly demand a deal. “They say, ‘We want deal!’ ” Trump quipped, prompting laughter from the campaign rally audience, the Hill reported.

Just before trying the accent, Trump said: “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's remarks come one day after he suggested President Xi Jinping of China deserved a McDonald’s hamburger and not a formal White House state dinner, during the Chinese leader's upcoming visit to the U.S. Trump also faced considerable criticism for comments he made about Mexican immigrants when he launched his campaign in June. But he isn't the only GOP candidate facing criticism over insensitive speech.

Republican presidential candidate and former Florida Gov. Jeb Bush, who is Trump's nearest rival, faced criticism Monday for linking Asians to the term “anchor babies,” a phrase referring to the children of unauthorized immigrants who might help them avoid deportation. “Frankly, it's more Asian people,” Bush said while out campaigning, the Morning Post said.

Members of the Congressional Asian-Pacific American Caucus, a group of U.S. lawmakers in Washington, condemned Bush's remarks, but issued no official comments on Trump's campaign rally speech. "We need a conversation that leads to a solution on visas and naturalization and seriously considers how we can integrate the 11.5 million undocumented immigrants already living and contributing here," said U.S. Rep Judy Chu of Pasadena, California, who chairs the caucus. "All that is accomplished through talk of anchor-babies -- be they from Latin America, Asia, Europe or Africa -- is to use xenophobic fears to further isolate immigrants. It’s time for our country to return to a substantive discussion on immigration.”

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