Sen. Edward Kennedy worked with the KGB in the early 1980s to undermine President Reagan:

Kennedy was deeply troubled by the deteriorating relationship between the United States and the Soviet Union, which he believed was bringing us perilously close to nuclear confrontation. Kennedy, according to Chebrikov, blamed this situation not on the Soviet leadership but on the American president—Ronald Reagan. Not only was the USSR not to blame, but, said Chebrikov, Kennedy was, quite the contrary, “very impressed” with Andropov.

Is Hamas the new Soviet Union?