Russian President Vladimir Putin supervised his intelligence agencies' hacking of the U.S. presidential election and turned it from a general attempt to discredit American democracy to an effort to help Donald Trump, three U.S. officials said on Thursday.
The U.S. officials - who have knowledge of intelligence information on the matter -- said on the condition of anonymity that the hacking of U.S. political groups and figures had a more general focus at first.
"This began merely as an effort to show that American democracy is no more credible than Putin's version is," one of the officials said.
"It gradually evolved from that to publicizing (Hillary) Clinton's shortcomings and ignoring the products of hacking Republican institutions, which the Russians also did," the official said.
By the fall, the official said, it became an effort to help Trump's campaign because "Putin believed he would be much friendlier to Russia, especially on the matter of economic sanctions" than Democratic rival Clinton.