Katzenbach v. McClung, 379 U.S. 294 (1964), is a landmark decision by the United States Supreme Court. The Court held that Congress acted within its power under the Commerce Clause of the United States Constitution in forbidding racial discrimination in restaurants as this was a burden to interstate commerce. The ruling was a 9–0 decision in favor of the plaintiff—the United States government. It was also a test case of the Civil Rights Act of 1964. In particular,

Background 
Ollie's Barbecue was a family-owned restaurant that operated in Birmingham, Alabama, that seated 220 customers. It was located on a state highway and was 11 city blocks from an interstate highway. In a typical year, approximately half of the food it purchased from a local supplier came from out-of-state. It catered to local families and white-collar workers. However, they refused to serve African American customers in the restaurant. About 24 of the 36 employees of the restaurant were black.

Congress passed the Civil Rights Act of 1964 outlawing segregation in American schools and public places. One section of the act, Title II, was specifically intended to grant African-Americans full access to public facilities such as hotels, restaurants,  and public recreation areas. On the same day, the Supreme Court heard challenges to Title II from a motel owner and from Ollie McClung. Both claimed that the federal government had no right to impose any regulations on small, private businesses. Both ultimately lost. Ollie McClung had won in the United States District Court for the Northern District of Alabama when he received an injunction preventing the Government from enforcing Title II against his restaurant. But then U.S. Attorney General Nicholas Katzenbach, appealed this decision to the U.S. Supreme Court.

Opinion of the Court 
McClung argued that the Civil Rights Act was unconstitutional, at least as applied to a small, private business such as his. McClung further argued that the amount of food purchased by Ollie's that actually crossed state lines (about half of the food at Ollie's) was so small that Ollie's effectively had no effect on interstate commerce (although McClung admitted that a significant amount of Ollie's business was to interstate travelers). Because of this, McClung argued that Congress had no power to regulate Ollie's Barbecue under the Commerce Clause.

The court ruled unanimously that the Civil Rights Act is constitutional and that it was properly applied against Ollie's Barbecue.

Justice Clark wrote the majority opinion, with concurrences by Justices Black, Douglas, and Goldberg. In section 2 of the opinion, the Court agreed with McClung that Ollie's itself had virtually no effect on interstate commerce. In section 4 of the opinion, the Court held that racial discrimination in restaurants had a significant impact on interstate commerce, and therefore Congress has the power to regulate this conduct under the Commerce Clause. The Court's conclusion was based on extensive Congressional hearings on the issue.

Later developments 
After decades in operation, Ollie's Barbecue moved to the suburb of Pelham in 1999 and closed in 2001.

Notes

References 

United States Supreme Court cases
1964 in the United States