President-elect Donald Trump walks out of an elevator speak to the media at Trump Tower on December 6, 2016 in New York City.

President-elect Donald Trump has canceled his planned Dec. 15 address set to explain how he would address his business conflicts of interest prior to assuming the White House, a senior transition source told NBC News. Instead, the announcement is delayed until January.

The news of the cancellation was first reported by Bloomberg Monday evening, with Trump transition officials telling the publication that there is no date for the announcement, but it will be prior to his inauguration on Jan. 20.

Trump's last press conference was 138 days ago in July (when he invited Russia to hack Hillary Clinton's email).

More from NBC News:

Donald Trump Talks Policy, Conflicts, Calls Idea Russians Helped Him 'Ridiculous'

Clinton Camp Calls Intelligence on Russian Election Hacking 'Compelling'

Why the CIA Thinks Russia Wanted Trump to Win



Late Monday, Trump tweeted that he would be "leaving my busineses (sic) before January 20th" so he could "focus full time on the presidency."

He added that "Two of my children, Don and Eric, plus executives, will manage them. No new deals will be done during my term(s) in office."

Legal experts have noted that Trump's sprawling business interests make him the most conflict-of-interest-prone president in modern history. He controls more than 500 companies across many industries and spanning the globe.

