DURING a speech hinting that he'll enter the 2012 US presidential race, real estate mogul Donald Trump called China's leaders motherf------.

The setting on Thursday night was fitting for the casino mogul whose moniker is draped across the gold-tinged Trump International Hotel and Tower just off the Las Vegas Strip.

An open bar greeted more than 1000 people, waiters passed hors d'oeuvres, and a Trump impersonator entertained the crowd.

At one point, a woman in the lavish reception at the Treasure Island casino yelled out that Trump should run for president.

"I think I am going to make you very happy," the developer said.

But he later said, "There is a real good chance that no matter what happens I won't win because one of these blood-sucking politicians who's been bulls---ing people for years will end up still getting elected."

During a 30-minute stump speech focused mostly on foreign affairs, Trump sprinkled in a number of swear words and insults directed toward global leaders.

"Our leaders are stupid, they are stupid people," he said. "It's just very, very sad."

Trump also blasted President Barack Obama's handling of Libya, Iraq, China and Afghanistan, and in one of his many curse-bombs, he lamented the nation's focus on building schools in war-torn Afghanistan while neglecting education in the US.

He said he wouldn't help struggling nations such as South Korea, Iraq or Libya without payment.

"I'm interested in protecting none of them unless they pay," he said.

When discussing trade, he said he would tell China's leaders, "Listen you motherf------, we're going to tax you 25 per cent."

A frequent critic of the federal healthcare law passed last year, Trump said the Supreme Court should decide the dozens of lawsuits challenging the legislation and urged district courts not to waste their time on it.

Trump has created waves by questioning whether the President was born in the US. Mr Obama produced his detailed Hawaii birth certificate on Wednesday, and Trump eagerly took credit for the revelation.

Trump's visit to Nevada came a day after he travelled to New Hampshire, which is set to host the first presidential primary in 2012. Nevada's caucus is scheduled to be the third presidential contest next year.

Trump hosts the successful reality series The Celebrity Apprentice on NBC.

"If I run and if I win, we will have a rich country again," he told the casino crowd yesterday.