The head of the Central Intelligence Agency said on Sunday that Russia and others are trying to undermine elections in the United States, the next major one being in November when Republicans will try to keep control of Congress.

U.S. intelligence agencies have concluded that Russia interfered in the 2016 presidential election to try to help President Donald Trump win, in part by hacking and releasing emails embarrassing to Democratic presidential candidate Hillary Clinton, and spreading social media propaganda.

CIA Director Mike Pompeo told CBS that the Russian interference is longstanding, and continues. Asked on "Face the Nation" if Moscow is currently trying to undermine U.S. elections, Pompeo responded: "Yes sir, have been for decades."