One of the charter schools' most vocal advocates said he considered them to be virtually a dead issue now.

Many librarians have been vocal and active advocates of open access.

He was a vocal advocate of equal opportunities for individuals in business.

He has been a vocal advocate for space research in Pakistan.

"He became a much more vocal advocate with that letter," said one owner.

"Iraq's most vocal advocates now have a big problem," said a senior American official.

Afterward, he became a vocal advocate for the rights of the disabled.

He was also a vocal advocate of a scientific and rational Christianity.

As a state representative, he was a vocal advocate for his neighborhood.