The U.S. is accusing Russia of hacking political sites, saying it is trying to interfere with the upcoming presidential election.
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Intelligence officials say they are confident that the Russian government directed the recent breaches of emails from American people and institutions, including U.S. political organizations.
The Office of the Director of National Intelligence and the Department of Homeland Security have released a joint statement saying that based on the "scope and sensitivity" of the hacking efforts, only Russia's "senior-most officials" could have authorized these activities.
Pressure has been mounting on the Obama administration to call out Russia on the hacking of political groups, including the Democratic National Committee.