When Richard Nixon unveiled his “law and order” theme at the 1968 Republican National Convention in Miami Beach, the nation that year had witnessed the assassinations of Martin Luther King Jr. and Robert F. Kennedy, several race riots that destroyed portions of major cities and growing rancorous protests over the Vietnam War.adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-LOCAL","nativepaywallcategory" : "NATIVE_PREM-LOCAL"};