He was the principal advocate of the secret French code.

He is the principal advocate and defender of Joseph Greenberg's approach to language classification.

He is considered a principal advocate in Wyoming of individual freedom and limited government.

Had you become the principal advocate of having this program go forward?

A. I don't believe I was the principal advocate.

It was the principal advocate of the Palestinian cause in Ireland during the 1970s and the 1980s.

The movement should establish itself, they said, as the principal advocate of nations that are too small or impoverished to have a voice in world affairs.

Our mission is to serve as the principal advocate for and steward of South Carolina's natural resources.

Daniel Biasone (contributor - founding owner and principal advocate of shot clock)

Altmeyer was the principal advocate for changes to the Social Security Act in 1939.