Radio Address to the Nation on Nuclear Weapons
04/16/1982
https://www.presidency.ucsb.edu...
Don't believe them when they say it can't be done.
I am therefore accepting with regret his resignation as Chief of Staff, effective today.
I am also pleased to announce that Howard H. Baker, Jr., has agreed to serve as Chief of Staff to the President of the United States.
Don Regan has served the administration and the Nation with distinction for 6 years.