Lyndon Johnson was a welfare state President and the first president that I really despised, but he was certainly no Marxist-Leninist.
In fact his bitterest enemies were the American Left, some of whom became the braintrust of the Obama Democrats. LBJ was an FDR liberal and a lousy president, but he was not a communist of any sort.
His programs had a socialist bent which echoed Marxist/Leninist solutions to pressing economic problems. And my point is, regardless of LBJ and who our leaders were: American society *at large* was going through an inner siege. For better (civil rights) and worse (secularization - which is definitely Marxist influence. )