>> Russian president Vladimir Putin did direct the hacking of the US presidential election to help Donald Trump. That's according to three US officials who spoke on the condition of anonymity and have knowledge and intelligence information on the matter. Reuters cyber security correspondent Dustin Boles has the details.>> There are a variety of theories about why Vladimir Putin wanted to hack the US election.
Hillary Clinton herself came out today and said that she believes that a personal beef between her and Putin going back to her time as Secretary of State was really the motivating factor for Putin here. When she was Secretary of State, Clinton sort of cast doubts on the results of an election in Russia and Putin always sort of viewed that as ever since.
So one of the possibilities is here is just that this hacking campaign started as a grudge match. Bad blood between Putin and Clinton that Putin was really just trying to embarrass her and shake up her campaign a little bit. And it evolved over time as more of a direct effort to support Republican nominee Donald Trump's candidacy.
>> One official telling Reuters that the hacking became an effort to help Trump's campaign because quote, Putin believed he would be much friendlier to Russia, especially on the matter of economic sanctions. On Tuesday, the president-elect officially made his pick for Secretary of State, ExxonMobil CEO Rex Tillerson. Who has been a vocal opponent of those trade sanctions imposed on Russia.
>> Russia, if you're listening. I hope you're able to find the 30,000 emails that are missing.>> US intelligence agencies conclusion that Russia interfered with the election has angered Trump.>> Who says he won the vote fairly. Russian officials have denied accusations of tampering in the US election.