He faced a tough race against future Member of Parliament Werner Schmidt and future MLA Gordon Wright.
Because Werner Schmidt lead the Social Credit party from outside the legislature from 1973 to 1975, Henderson was recognized as the Leader of the Opposition for a portion of 1973.
Under his leadership the party only won four seats in the 1975 provincial election and Schmidt, failing to win his own seat, returned to private life.
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After his leadership election, Schmidt ran in the electoral district of Calgary-Foothills in a by-election held on June 25, 1973 but was defeated by Stewart McCrae.
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Schmidt was vice-president of Lethbridge Community College when he was chosen to succeed Harry Strom as leader of the Alberta Social Credit Party following the defeat of Strom's government in 1971 despite the fact that Schmidt had never held a seat in the Alberta legislature.
Werner Herzog | Hans Werner Henze | Helmut Schmidt | Werner Heisenberg | Rainer Werner Fassbinder | Eric Schmidt | Werner | Helle Thorning-Schmidt | Harold von Schmidt | Hans Schmidt | Susan Werner | Otto-Werner Mueller | Otto Schmidt | Mike Schmidt | Werner von Siemens | Werner Arber | Schmidt camera | Kenny Werner | Karl Schmidt-Rottluff | Josh Werner | Johann Friedrich Julius Schmidt | Jean Schmidt | Wolfgang Schmidt | Werner Winter | Werner Weber | Werner Sombart | Werner Meyer-Eppler | Werner, Margrave of the Nordmark | Werner Klemperer | Werner Franke |