Asked about the charges, he said that even Vice-President Mike Pence had called the investigation into question.
“So until we see the facts, everything else is just blather.”
What does the indictment say?
Deputy Attorney General Rod Rosenstein said there was no allegation that any American was “a knowing participant in this illegal activity” nor was it alleged that the meddling altered the election outcome.
Three of the people named have also been accused of conspiracy to commit wire fraud and five have been accused of aggravated identity theft. Three companies have also been charged.
The 37-page indictment says a group of Russians:
Posed as Americans, and opened financial accounts in their name; some visited the US
Spent thousands of dollars a month buying political advertising
Purchased US server space in an effort to hide their Russian affiliation
Organised and promoted political rallies within the United States
Posted political messages on social media accounts that impersonated real US citizens
Promoted information that disparaged Hillary Clinton
Received money from clients to post on US social media sites
Created themed groups on social media on hot-button issues, particularly on Facebook and Instagram
Operated with a monthly budget of as much as $1.25m (£890,000)
Financed the building of a cage large enough to hold an actress portraying Hillary Clinton in a prison uniform
“By 2016, defendants and their co-conspirators used their fictitious online persons to interfere with the 2016 US presidential election,” the indictment continues.
“They engaged in operations primarily to communicate derogatory information about Hillary Clinton, to denigrate other candidates such as Ted Cruz and Marco Rubio, and to support Bernie Sanders and then-candidate Donald Trump.”
One of the companies targeted is the Internet Research Agency, based in St Petersburg, which the indictment said “had a strategic goal to sow discord in the US political system, including the 2016 US presidential election”.