Lyndon Johnson actually said...

The Secretary of Defense is authorized to delegate to one or more of the Secretaries of the military Departments any of the authority confer...

The Secretary of Defense is hereby authorized and directed to call into the active military service of the United States, as he may deem app...

I do command all persons engaged in such acts of violence to cease and desist therefrom and to disperse and retire peaceably forthwith.

I have directed the troops you requested to proceed to O'Hare Field and to Glenview Naval Air Station.