Donald Trump dropped out of the Conference on Conservative Political Action (CPAC) and instead campaigned in Kansas and Florida.
CPAC organizers said they were “very disappointed”.
The President of the Republican President was to speak on March 5 at a meeting of conservative activists in Maryland.
All Republican presidential candidates for Donald Trump are expected to speak.
“Very disappointed, Donald Trump decided at the last minute to drop out of the CPAC – his choice sends a clear message to conservatives.” CPAC Tweet.
Donald Trump’s campaign team said in a statement that it would instead hold a rally in Kansas, followed by a rally in Orlando.
The statement said Donald Trump was looking forward to attending next year, “hopefully as president of the United States.”
The decision may further damage the already strained relations with the established organization of the GP.
Donald Trump was attacked on March 3 by former Republican presidential candidate Mitt Romney, who remains a central figure in the party.
Mitt Romney called Donald Trump “fake” and “fraudulent” and said his conflicting policies threatened to make the world less secure.
Later on March 3, Donald Trump was attacked by his rivals in the nominations for a Republican debate in Detroit. Marco Rubio and Ted Cruz criticized the New York businessman for changing his position on various issues.
Donald Trump has admitted that he has changed his position on the issues, but says flexibility is a strength.
Republicans in four states – Kansas, Kentucky, Louisiana and Maine – go to the polls on March 5.
Donald Trump has already won 10 of the 15 countries that have voted so far with his promise to “make America great again.”