.... But the big bombshell the tycoon is threatening to drop on the Obamas, a bombshell he claims could change the course of the US Presidential election, has been revealed ahead of time by a financial adviser with links to Trump.
Douglas Kass, who often appears with Trump on the US talkshow Squawkbox and has written for the Wall Street Journal, tweeted: "High above the Alps my Gnome has heard that Donald Trump will announce that he has unearthed divorce papers between the Prez and his wife."
The tycoon and Apprentice host, who has a history of making false allegations about the President, will allegedly claim that the papers show Barack and Michelle Obama seriously considering splitting up.
The divorce rumour first reared its head in a recent book about Obama by author Ed Klein. He said the Obamas hit a rough patch in 2000 and Michelle "actually had divorce papers drawn up". The claim was denied by the White House.
When asked by Mail Online about Kass's tweet, Trump's spokesman did not deny it. The day before Trump's right-hand man, Michael Cohen, denied that Trump would be speaking about an anonymous rumour that Obama sold cocaine in college.
The fact that Trump announced he would be dropping a bombshell the day after the last presidential debate smacks of dirty campaigning by America's hard right.
Trump has tried to smear the President before. He was a vocal proponent of the discredited "birther theory", that Obama was born in Kenya and not Hawaii, and is therefore disqualified from being President of the United States.
Even if the divorce papers are genuine, it's hard to see how they could hurt the Obama campaign; it's more likely the backlash against Trump will hurt the Republicans and their candidate, Mitt Romney.
