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In page Ken Curtis:

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Besides engaging in the usual personal appearances most television stars undertake to promote their program, Curtis also traveled around the country performing at Western-themed stage shows at fairs, rodeos, and other venues when Gunsmoke was not in production, and even for some years after the show was cancelled. Curtis also campaigned for Ronald Reagan in 1976, during the future President's attempt to secure the Republican nomination from incumbent Gerald Ford.[citation needed]