Hacking the 2016 US election: a timeline

Over the summer, a security company hired by the Democratic National Convention tells the DNC that they have been successfully infiltrated by hackers for more than year. Two groups, known as Cozy Bear and Fancy Bear, both have links to the Russian government, the Washington Post reports.

At the end of July, the FBI launches an investigation into whether or not the Russian government ordered the DNC hack. Kremlin spokesman Dmitry Peskov calls the move "paranoid."

On the campaign trail, Republican nominee Donald Trump encourages Russia to "find the 30,000 emails that are missing." In a series of debates with rival Hillary Clinton, Trump casts doubt on Moscow's role in hacks that targeted the DNC and Clinton's campaign manager, John Podesta.

Anti-secrecy website WikiLeaks begins releasing slightly compromising emails from Clinton campaign chairman John Podesta. Co-founder Julian Assange defends targeting Clinton, saying Trump's own statements are indictment enough of the Republican nominee. Over a period of months, WikiLeaks consistently denies allegations that its sources are based in Russia.

In a rare moment of complete agreement for the two biggest intelligence agencies in the US, both the FBI and CIA come to the conclusion that the Russian government sought to influence the US election by promoting unfavorable coverage of Hillary Clinton.

Trump, who has made no secret of his admiration for Russian President Vladimir Putin, calls the intelligence reports "ridiculous." Anti-Clinton voices slam the probe as a distraction meant to discredit the now president-elect. This puts Trump at odds with Republicans in Congress who call for an independent investigation.

At the end of December, the Obama administration expels 35 Russian diplomats and shuts down two Russian intelligence compounds as the Kremlin continues to deny having a role in the summer's cyberattacks. President Putin eschews direct retaliation, saying he will wait to see how President-elect Trump's Russia policies play out.