Property tycoon Donald Trump has reportedly tweeted an image of himself with German soldiers in World War II overlayed with the American flag as part of his presidential campaign.

The post featuring the alleged German infiltrators, which also included images of the White House and cash, was reported to Mr Trump’s office by a Twitter user, thedailybeast.com reported.

Within minutes, Mr Trump deleted it and his organisation blamed an intern for the error.

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America’s most flamboyant and outspoken billionaire announced his intention to run for presidency in June, promising to make America great again.

The 69-year-old long-shot candidate ridiculed the country’s current crop of politicians and vowed to take on the growing might of China in a speech launching his campaign.

Mr Trump’s post had tongues wagging. Photo: Twitter

Mr Trump said in his speech unemployment had risen sky high in the US, even past 20 per cent, challenging government figures that put it at under 6 per cent.

“Don’t believe the 5.6 per cent. Don’t believe it,” Mr Trump said, adding that China and Mexico had stolen American jobs.

“When was the last time anyone saw us beating, let’s say, China in a trade deal. They kill us. I beat China all the time.

“When did we beat Japan at anything? They send their cars over by the millions and what do we do?

“Our enemies are getting stronger and stronger by the day, and we as a country are getting weaker.”