Origin
Having, along with thousands of other Americans, participated in taking down fascism in Europe Bill Day is dishearten on returning home to find that it is alive, well and active in the States.
Deciding to do something about it he calls himself the Challenger and travels the nation fighting American Fascists, race haters, union busters, and hate mongers. He also creates the Challenger Club to bring like minded people together for his cause.
Having no special skills or abilities The Challenger just shows up where he finds himself need and keeps at it until he makes a difference. At the conclusion of which he has a tendency to then make a speech.
Creators
The Challenger was the featured character of a short lived comic with an unusual theme, the promotion of tolerance and fighting prejudice.