Donald Alphonse Callahan (September 8, 1876 – October 26, 1951) was a mining industry leader and Republican politician from Idaho.
Born and raised in Galena, Illinois, Callahan had little access to education in his youth; he entered high school at the age of twenty and graduated sixteen months later.
He worked as a deputy to a federal court clerk in Freeport, Illinois,[1] where he was also the local supervisor of the 1910 United States Census,[2] and then entered the practice of law in Chicago.
[1] He was the 1938 Republican nominee for the United States Senate seat in Idaho.
[3] A Roman Catholic, he died in a Los Angeles hospital at the age of 76, having had a heart attack while attending an American Mining Congress convention in that city.