Black Lives Matter and the Fight for $15 movement have scheduled rallies in Memphis, Tennessee - where King was shot while standing on a hotel balcony on April 4, 1968. Rallies also are expected in Florida, California, Illinois and Michigan.
PHOTOS: The legacy of Martin Luther King, Jr.
The Fight for $15 group wants a higher minimum wage for low-pay workers, including fast food employees and home and child care workers. The Black Lives Matter movement developed after the deaths of unarmed black men during confrontations with white police officers and has waged protests throughout the country.
King had come to Memphis to support a sanitation workers strike.
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