Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: To answer the question, consider the following: The GCA was signed into law by President Lyndon B. Johnson on October 22, 1968, and is Title I of the U.S. federal firearms laws.
The question and answer:
The GCA was signed into law by President Lyndon B. Johnson on October 22, 1968, and is Title I of the U.S. federal firearms laws. The National Firearms Act of 1934 (NFA) is Title II. Both GCA and NFA are enforced by the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF).

Based on this passage, who signed the gun control act of 1968?
The answer is President Lyndon B. Johnson