In 1967, he moved to Louisiana to complete research for his Doctor of Philosophy dissertation about Earl Long.
He received a bachelor"s degree from Georgetown University in Washington, District of Columbia and then took post-graduate studies at the University of Arizona in Tucson. After completing his graduate studies, Renwich remained in New Orleans as a professor at Loyola University and its Institute of Politics. He also became a popular political analyst for WWL-television, the Columbia Broadcasting System affiliate in New Orleans.
A Democrat, Renwich said that he could not leave Louisiana because the state is "heaven for a political junkie".
According to Renwick: "We"re so divided in Louisiana -- by ethnicity, by race, by religion, by language, by geography. Having all these different forces makes the politics lively.
lieutenant"s never boring here. In the 1992 United States. presidential election, Renwick attributed the defeat of United States. President George Herbert Walker Bush to the Independent candidate, also from Texas, H. Ross Perot.
Renwick said that the winning candidate Bill Clinton ran little better among white voters than had the 1988 Democratic nominee, Michael Dukakis.
"Perot gutted the Republican vote," Renwick told the organization, the Council for a Better Louisiana.