According to the Washington Post:
The CIA has concluded in a secret assessment that Russia intervened in the 2016 election to help Donald Trump win the presidency, rather than just to undermine confidence in the U.S. electoral system, according to officials briefed on the matter.
Intelligence agencies have identified individuals with connections to the Russian government who provided WikiLeaks with thousands of hacked emails from the Democratic National Committee and others, including Hillary Clinton’s campaign chairman, according to U.S. officials. Those officials described the individuals as actors known to the intelligence community and part of a wider Russian operation to boost Trump and hurt Clinton’s chances.