In this photo provided by the Jimmy Carter Presidential Library, Dale Haney poses for a photo at the White House on April 20, 1979. (Jimmy Carter Presidential Library /via AP)
Jim Adams, left, supervisory horticulturist with the National Park Service, and Dale Haney, right, White House grounds superintendent, walk through Douglas firs looking for trees that will be used in the White House during the holiday season at on Oct. 30, 2013, in White Township, N.J. John Wyckoff and family were the Grand Champions at the National Christmas Tree Association’s annual tree contest and won the right to present trees for use in the White House. (Matt Smith/The Express-Times via AP, File)
Dale Haney takes the first pet Bo for a stroll on the South Lawn of the White House in Washington, April 27, 2009. Haney has been a constant through the past 10 presidencies. As of this month, Haney has tended the lawns and gardens of the White House for 50 years. (AP Photo/Gerald Herbert, File)
President Joe Biden shakes hands with Dale Haney, the chief White House groundskeeper, right, during a tree planting ceremony on the South Lawn of the White House on Oct. 24 in Washington. First lady Jill Biden looks on at center. The Bidens recognized Haney who as of this month has tended the lawns and gardens of the White House for 50 years. (AP Photo/Evan Vucci)
WASHINGTON — Presidents come and go, but one constant through 10 presidencies has been Dale Haney, the chief White House groundskeeper, who as of this month has spent 50 years serving the families — and many of their pets — who have called the mansion home.