At the 1980 federal election, Joh Bjelke-Petersen arranged against the wishes of Party President Sir Robert Sparkes for his wife to be placed in the Number 1 position on the National Party's Queensland Senate ticket, ensuring her election.
In 1981, Hartwig was expelled from the National Party caucus by a vote of 33 to 2 for repeated criticism of party president Sir Robert Sparkes.
Most of his term was served during the period of the Bjelke-Petersen-led National Party state government.
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