He was known as persistent advocate of educational psychology, and scientific pedagogy.

Mining interests have been the most persistent advocates of Navajo relocation.

Still, according to many of the oldest and most persistent advocates for change, this time is different.

Senator Lieberman is a persistent advocate for the Connecticut defense industry.

The Lindon family had been one of the most vocal and persistent advocates for the overpass.

He has been a persistent advocate for disarmament, and a world free of nuclear weapons.

He was also a persistent advocate of equal employment opportunities for minorities.

Others came forward, but those five were the most forceful, persistent advocates, according to Microsoft.

For decades, he has been one of the most persistent advocates for reopening the case.

He was also a persistent advocate for government-funded internal improvements, which helped the state's businesses.