In her new campaign memoir, What Happened, Hillary Clinton reveals that she has followed "every twist and turn of the story," and "read everything I could get my hands on," concerning Russia's role in the 2016 presidential election. "I do wonder sometimes about what would have happened if President Obama had made a televised address to the nation in the fall of 2016 warning that our democracy was under attack," she writes.

Clinton has had a lot to take in. Since Election Day, the controversy over alleged Russian meddling and Trump campaign collusion has consumed Washington and the national media. Yet nearly one year later there is still no concrete evidence of its central allegations. There are claims by US intelligence officials that the Russian government hacked e-mails and used social media to help elect Donald Trump, but there has yet to be any corroboration. Although the oft-cited January intelligence report "uses the strongest language and offers the most detailed assessment yet," The Atlantic observed that "it does not or cannot provide evidence for its assertions." Noting the "absence of any proof" and "hard evidence to back up the agencies' claims that the Russian government engineered the election attack," The New York Times concluded that the intelligence community's message "essentially amounts to 'trust us.'" That remains the case today.