McBride was elected to the House of Representatives at the
1931 election, when he won
Grey for the
United Australia Party, defeating incumbent
Labor MP
Andrew Lacey. As a backbencher, he advocated for increased assistance to farmers and lower tariffs, and was concerned with the interests of the wheat and wool industries, given that he represented one of the largest electorates in Australia. He was easily re-elected in 1934. Badman resigned from the Senate and contested and won Grey at the federal election, while McBride, already endorsed for the Senate ticket at the 1937 election, the victors in which would not take their seats until July 1938, was appointed to Badman's Senate vacancy in the interim. The deal had also been unusual in that McBride and Badman caucused with separate federal parties. Although both were members of the same state party, the
Liberal and Country League, Badman was a member of the UAP's federal coalition partner, the
Country Party. He returned to parliament for the Liberal Party at the
1946 general election, winning the House of Representatives seat of
Wakefield. Following the election of the Menzies government in
1949, McBride became
Minister for the Interior from 1949 to 1950, and again resigned his directorships. In 1950, he was appointed
Minister for Defence, a position he retained until his retirement from politics in 1958. He was described as having been a "close confidant" to Menzies and "an influential member of [Menzies'] inner circle" and, when he retired, was the last of the "Old Guard" of ministers who had supported Menzies when he had lost the UAP leadership in 1941. After retiring from parliament, McBride again served as chairman of
Elder Smith and Co Ltd (later Elder Smith Goldsbrough Mort Ltd), was on the board of the
Bank of Adelaide and Wallaroo-Mount Lyell Fertilisers Ltd, and was a member of the
Australian Wool Board. He was also federal president of the Liberal Party from 1960 to 1965. McBride died at his home at
Medindie in 1982 and was cremated. He was survived by his wife and two of his sons. His great-grandson is the
independent South Australian state parliamentarian
Nick McBride, who quit the Liberal Party in 2023. ==Honours==