No other candidate for the White House this year has anything close to Trump’s record of repeated social and business dealings with mobsters, swindlers, and other crooks. Professor Douglas Brinkley, a presidential historian, said the closest historical example would be President Warren G. Harding and Teapot Dome, a bribery and bid-rigging scandal in which the interior secretary went to prison. But even that has a key difference: Harding’s associates were corrupt but otherwise legitimate businessmen, not mobsters and drug dealers.

http://www.politico.com/magazine/story/2016/05/donald-trump-2016-mob-organized-crime-213910