The Voting Rights Act of 1965, signed into law by President Lyndon B. Johnson, aimed to overcome legal barriers at the state and local levels that prevented African Americans from exercising their right to vote as guaranteed under the 15th Amendment to the U.S. Constitution.
In the early 19th c., the South of the country tended to oppose tariffs. As you may already know, the South opposed many things, slavery being the most important thing.