Russia has tried to influence U.S. elections since the 1960s during the Cold War, U.S. Director of National Intelligence James R. Clapper said Tuesday.It's not clear whether the interference, which has a long history, aims to influence the outcome of the election or tries to sow seeds of doubt about the sanctity of the process, Clapper said in an interview to The Washington Post.The remarks are the closest the U.S. spy chief has come to suggesting that Russia could be involved in recent hacks of Democratic party organizations.The Russians have been blamed by security experts and presidential candidate Hillary Clinton for recent hacks of Democratic Party organizations, including the Democratic National Committee, whose stolen emails were released by WikiLeaks. The whistleblowing site has declined to name its source for the emails, which suggested that committee officials had favored Clinton over rival Senator Bernie Sanders.There have also been reports of a hack of the Democratic Congressional Campaign Committee and of an investigation by the FBI into a hack by foreign attackers of state election databases. On Tuesday, Clapper did not, however, name the Russians as the culprits behind the recent hacks, a stand which he has avoided previously as well. At the Aspen Security Forum in July, Clapper said his agency was not quite ready yet to make a public call on the attribution of the hack.But Clapper told The Washington Post that \u201cthere\u2019s a tradition in Russia of interfering with elections, their own and others.\u201d He added that it shouldn\u2019t come as a big shock to people. \u201cI think it\u2019s more dramatic maybe because now they have the cyber tools that they can bring to bear in the same effort,\u201d he said.To make sure that hackers don\u2019t get to the electoral system, the Department of Homeland Security is working with state election officials, offering all assistance to the states on best practices on security, specially where there is any dependence on the Internet, Clapper said.The official said the U.S. had an advantage in that its electoral system is decentralized among states and local officials. Clapper said it would hence be \u201ca monumental undertaking\u201d to try to affect the election nationally.At the G20 summit in China earlier this month, President Barack Obama said the country has had problems of cyber intrusions by Russia and other countries, but he did not want it to mushroom into a \u201ccycle of escalation,\u201d similar to other arms races in the past. He would rather have countries agree on norms of cyber behavior.