Politicians who believe in conspiracies have become more and more numerous since the early 2000's, thanks to the rapid spread of misinformation enabled by the Internet. They've also become commonplace thanks to post 9/11 fear of terrorist attacks, and the election of a liberal, African-American president in Barack Obama.
These political conspiracies almost always involve some kind of plot against American freedom, capitalism, and individual rights. They usually involve Obama and Democrats, though those liberals also believe in conspiracy theories - just not with the same enthusiasm that conservatives seem to. You don't have to even stay in national politics - many local officials and state senators are well-known for spouting political conspiracy theories. It might even be what gets them elected to higher office.Here are all manner of politicians, from presidential candidates to local office-holders, who are all on record as believing in some kind of conspiracy theory.
Invictus is also a pretty hardcore conspiracy theorist, claiming he wants to start a second Civil War, advocating for the return of eugenics, and for renouncing his US citizenship - which will presumably make running for the Senate harder. Libertarian Party officials have called Invictus an embarrassment.
In 2012, Bachmann and four other Republican representatives sent letters to five different federal agencies accusing the Muslim Brotherhood of having achieved “deep penetration” into the highest levels of the government. The move drew condemnation from both parties, and when Bachmann was challenged to provide proof to support these allegations, she simply repeated them.
see more on Michele Bachmann
see more on Ron Paul
see more on John Cornyn