Vice President Richard Nixon claimed that the new Republicans arriving in the White House "found in the files a blueprint for socializing America."
When John F. Kennedy entered the White House, his proposals to anchor America's nuclear defense in intercontinental ballistic missiles -- instead of long-range bombers -- and form closer ties with Eastern Bloc outliers such as Yugoslavia were taken as evidence that the young president was secretly disarming the United States.
Before the "black helicopters" of the 1990s, there were right-wingers claiming access to secret documents from the 1920s proving that the entire concept of a "civil rights movement" had been hatched in the Soviet Union; when the landmark 1964 Civil Rights Act was introduced, one frequently read in the South that it would "enslave" whites.
The federal government expanded mental health services in the Kennedy era, and one bill provided for a new facility in Alaska. One of the most widely listened-to right-wing radio programs in the country, hosted by a former FBI agent, had millions of Americans believing it was being built to intern political dissidents, just like in the Soviet Union.
Excellent historical perspective. In related news, only 53% of voters in Virgina, and only 54% in North Carolina, believe that Obama was born in the US.