Encouraged by his colleagues, Aubame entered politics, serving as Gabon's first representative in the National Assembly of France from 1946 to 1958.
Aubame was also a leader in solving African problems, particularly developing the Gabonese standard of living and planning urban sites.
Aubame's quick rise in Gabonese politics was spurred by the support of the missions and administration, whereas much of M'ba's strength came from the colonists.
Despite a rivalry, Aubame and M'ba, now the President of Gabon, formed several political unions which were sufficiently politically balanced to appeal to the electorate.
In appreciation for his help, M'ba appointed Aubame as foreign minister and later President of the Supreme Court.
Tensions soon rose between the two due to Aubame's refusal to merge his party with M'ba's and create a one-party state.
However, the coup was toppled three days later, and although he did not participate in the coup's planning, Aubame was sentenced to 10 years of hard labor and 10 years of exile.
He was beaten almost daily by his prison guards while serving out his sentence.
M'ba's successor as President, Omar Bongo, allowed the return of Aubame to Gabon in 1972.
The elder politician died in 1989 in Gabon's capital of Libreville.