Ideologically, Johnson was a progressive, often referred to as (somewhat erroneously) a Red Tory with beliefs similar to those held by Premier Roblin. Along with Roblin, he is considered by historians to be the leading political reformer of his generation and among the most influential cabinet ministers in Manitoba history. Although generally a free marketeer, Johnson supported government intervention in the economy in certain areas, for example, in such areas as public utility management, education, major infrastructure projects and certain medical services. When Roblin shifted to federal politics in 1967, Johnson was the only candidate from the Progressive Conservative Party's progressive wing to seek its leadership. A late entry into the leadership race hurt his campaign and while he was the alternative choice for leader among many delegates, the fact that Johnson did not survive to the later balloting prevented him from emerging as the possible compromise choice for party leader among delegates.