In 1964 and 1965, the
Student Nonviolent Coordinating Committee (SNCC) engaged in a voting drive in
Dallas County, of which
Selma was the
county seat. As sheriff of Dallas County, Clark vocally opposed
racial integration, wearing a button reading "Never" [integrate]. He wore military style clothing and carried a
cattle prod in addition to his pistol and club. Together with the
highway patrolmen of
Albert J. Lingo, the posse was intended to "operate ... as a mobile anti-civil rights force", and appeared at several Alabama towns outside of Clark's jurisdiction to
assault and threaten civil rights workers. At one point, Clark arrested around 300 students who were holding a silent protest outside the courthouse, force-marching them with cattle prods to a detention center three miles away. By 1965, only 300 of the city's 15,000 potential black voters were registered. After
The New York Times and
The Washington Post published photos of an SCLC protest at which Clark wielded a club and pushed
Amelia Boynton to the ground,
Ralph Abernathy nominated him for honorary membership in the
Dallas County Voters League, a local voting rights organization, for "publicity services rendered". ==Bloody Sunday==