In the 1977 federal election, Drake-Brockman retired and his seat was lost. As at 2018, he is the last member of what is now the National Party to be elected to the Senate from Western Australia.
During the 1977 federal election, Drake-Brockman stepped down, and his position in the Senate was vacated. By 2018, he remains the sole surviving National Party senator representing Western Australia in the upper house.