10/07/1987
https://www.presidency.ucsb.edu...
"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."
"I am therefore accepting with regret his resignation as Chief of Staff, effective today."
"You were of help and I thank you."
"Don Regan has served the administration and the Nation with distinction for 6 years."