US President-elect Donald Trump poured kerosene on a simmering dispute with Barack Obama today, accusing him of derailing a smooth transition with "inflammatory" statements and "roadblocks."
Ever since the November 8 election, Trump and Obama have tried to bury political differences in favour of a united public front that would smooth the transfer of power on January 20.
But the Republican president-in-waiting unceremoniously cast any bonhomie aside in a morning twitter tirade from his Mar-a-Lago estate in Florida.
In a declaration that is unprecedented in its personal condemnation of a soon-to-be predecessor, the 70-year-old tweeted: "Doing my best to disregard the many inflammatory President O statements and roadblocks."
"Thought it was going to be a smooth transition - NOT!"
Tensions between Trump and the current White House have been growing for weeks as Obama has become more outspoken about a vitriol-filled election, which saw Democrat Hillary Clinton suffer a shock defeat.
Obama -- who is still the most popular politician in the country -- recently suggested that he may have won a third term were he not constitutionally barred.
That seems to have irked the notoriously thin-skinned president-elect.