Mundt Act was passed after World War 2 for legal propaganda against all other countries except the US. The US never stopped propagandized the public but the statute allowed us to hold them accountable.
The Patriot Act is unconstitutional, in 2012 right before Christmas, this Smith-Mundt Modernization Act was sneaked through a partial Congress with the National Defense Authorization Act. 2 weeks later Sandy Hook happened. This needs to be reauthorized every few years because it is so criminal.