Stevenson identifies himself as an "Eisenhower Republican," saying the GOP was more moderate and the tax rates more progressive in the 1950s.
He said economic inequality is one of the main issues that drew him to the Wall Street protest.
"The middle class in America is disappearing," he said.
His past protest experience includes participation in a march for women in Washington, D.C., in 2004.
A social-media fueled plan to #OccupyWallStreet brought hundreds of protesters to Manhattan's financial center starting Saturday, Sept. 17.
|'Game of Thrones' season finale sets stage for epic march toward finish|
|Brexit turmoil deepens stock selloff: Pound dives, Dow loses 300 points|
|Brexit's broken promises: Health care, immigration and the economy|
|Blacks still far behind whites in wealth and income|
|U.K. loses perfect AAA credit rating after Brexit|