On June 4, 1910 President William Howard Taft visited Jackson to help dedicate a monument celebrating the 50th anniversary of the founding of the Republican Party.
Sources :
Tom George, “Leading the Way : Michigan and the Birth of the Republican Party”, Michigan History, September/October 2004.
Zlati Meyer, “President Taft dedicates boulder to mark where Republican Party was founded”, Detroit Free Press, June 1, 2014.