Trump put Vice President-elect Mike Pence in charge of his White House transition team, while demoting his former transition chief, tarnished New Jersey Governor Chris Christie, to one of the six vice-chair posts.

Daughter Ivanka and sons Eric and Donald Jr. and son-in-law Jared Kushner accounted for a fourth of the 16-member executive committee, which was filled with politicians and advisers who stuck with Trump during his rollercoaster first run for public office.

Aides huddled in the real-estate mogul's Trump Tower in New York City to begin prioritizing policy changes and considering Cabinet picks and other candidates for the 4,000 positions he will need to fill shortly after he takes the reins of the White House.

A member of the Trump transition team told Reuters there were more than 100 people now involved in developing "white papers" on what regulations to roll back after Jan. 20. Some environmental measures and a rule requiring retirement advisers to act in their clients' interests could be among the first on the chopping block, an industry lobbying source said.