CNN The resignation letter and a block letter are required under federal ethics guidelines for political appointees, and it is not clear how many people signed the letter or how many signed the letters.
CNN has not been able to independently verify the numbers of people who signed the resignations, nor how many are still in the position.
The letter said Trump’s behavior during the transition was “unacceptable and in clear violation of the Constitution, laws, and rules of the Executive Branch.”
The letter was signed by a majority of those on Trump’s transition team, including Kellyanne Conway, who is Trump’s chief strategist.
Conway did not sign the letter.
Former White House adviser Kellyann Conway and former campaign manager Corey Lewandowski have both signed the resignation letters.
Former campaign manager and counselor Kellyannen Conway signed the White House resignations letter.
She is also a former member of the Trump campaign, and served as a deputy campaign manager during the presidential transition.
Lewandowski also resigned.
In a tweet, Conway wrote that she was “proud to have served this country for many years, including as President-elect, and thank you for all you did for our country and our country’s future.
I’m honored and thankful to have been part of the @WhiteHouse team and look forward to working with President Trump and our great team of officials to make our country stronger, fairer and more secure.”
She wrote, “Thank you for your service, and I look forward in working with all of you to make the United States great again.”
The resignations come as Trump is under scrutiny over the 2016 election, which he won by large margins.
The White House has been under pressure to answer questions about his relationship with Russia and potential collusion with Moscow, but White House officials have denied any wrongdoing.
The White House is also under investigation for alleged Russian interference in the 2016 presidential election, and the Justice Department is reportedly investigating possible collusion between the Trump camp and Russia.
The Senate Intelligence Committee is also investigating Trump’s campaign and administration over allegations that it was aware of the Russia ties of former Trump campaign chairman Paul Manafort.
Manafort resigned from the campaign in October 2017 amid a congressional probe into his work as a lobbyist for a Russian oligarch.
The Washington Post reported that a federal grand jury is investigating whether the Trump team colluded with Russia in the election.
A spokesman for the Senate Intelligence committee declined to comment on the investigation.
The resignation letters are part of a federal ethics program that requires candidates to provide evidence of past conflicts of interest to the Federal Election Commission.
It is unclear how many political appointee resignations have been signed.
In 2017, the Senate Ethics Committee found that former White House chief of staff Reince Priebus violated ethics rules when he accepted millions of dollars from foreign entities.