If Russia is indeed behind the damaging leak of Democratic Party emails on the eve of its national convention, it's not just because President Vladimir Putin likes Republican nominee Donald Trump and his pro-Russian views, former U.S. officials and experts tell NBC News.
It's because the former KGB operative hates Trump's Democratic rival, Hillary Clinton, with such a passion that he wants to embarrass her personally and undermine — if not derail — her presidential campaign, they say.
For a Russian leader who is considered as vain as he is ruthless, Clinton's criticism long ago crossed over from the political into the personal. He carries a grudge against a woman who has publicly compared him to Hitler and expressed doubts that he has a soul.
"In addition to the policy disagreements that they have, I think Putin himself sees some of Clinton's remarks as a personal attack against him and the way he governs his country and how he conducts his foreign policy," said Michael McFaul, the U.S. ambassador to Russia from early 2012 to 2014.
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Like other former Obama administration Russia policy experts, McFaul said Putin-sponsored hackers were the most likely culprit in the hacking of 20,000 DNC emails that were posted last Friday by WikiLeaks. Cybersecurity experts also say mounting evidence all points in one direction.
Several former Obama administration officials said that when Clinton was secretary of state, she was by far the most aggressive and outspoken U.S. official when it came to countering Putin's efforts to consolidate his power domestically, and to expand his sphere of influence in the region and beyond. And when she left government, they say, Clinton became even more combative, going so far as to liken Putin to Hitler in 2014 for his annexation of part of Ukraine. The remark offended not just Putin but the Russian public.
Clinton was already a critic of Putin during her seven years in the Senate, where she was a member of the Armed Services Committee. In 2008, she made headlines for publicly doubting that then-President George W. Bush had gotten a sense of Putin's soul because as a former KGB agent he probably didn't have one.
By the time she became Secretary of State in 2009, U.S-Russia relations were especially tense, given Putin's invasion of the neighboring Republic of Georgia. The new administration launched a "reset" aimed at improving the bilateral relationship with Clinton as one of its leaders. But from the start she was especially suspicious of Putin, and vocal about it.
"She was always the tougher voice within our administration on Russia. "Even my colleagues at the White House would agree with that," said McFaul, the top National Security Council official on Russia from 2009 until he left for Moscow as ambassador. He described numerous occasions where top Russian officials, and a "pissed off" Putin himself, would rail against Clinton both publicly and privately.