Current laws prohibit political campaigns from receiving money or direct assistance from foreign governments, but loopholes that allow for the dissemination of election-related advertising that does not explicitly call for the election or defeat of a specific candidate.
"Until we see the facts, everything else is just blabber", Lavrov said.
The Department of Justice also clarified there are no allegations in the indictment that those charged altered the outcome of the 2016 election.
"I would say the Democrats are helping the Russians sow discord", Watters argued.
For the White House, this is seen as a victory, as Mr Mueller has spent nine months probing for potential direct collusion between campaign aides and Russian entities.
His cheers of vindication Friday appeared to be more show than substance.
"It does not point to collusion between the Russians and the Trump campaign, but it does indicate that what this really was about, for all the talk about and the effort to get us to look at other things, what this is really about is Russian interference in the USA presidential election, and we need to remember that". "The results of the election were not impacted", Trump tweeted. The indictment doesn't list the names of those who were contacted by the "email@example.com" account - instead, they are referred to as "Campaign Official 1", "Campaign Official 2" and so on.
Trump attorney John Dowd was jubilant in a statement of his own.
But neither the indictment nor Mueller's office has ruled out any potential collusion in any other plot to disrupt the election.
The highly detailed 37 page indictment covered everything from social media ads taken out by the Russian 'Internet Freedom Agency, ' to efforts to help with Trump rallies in Florida and other states - and even a post-election foray into anti-Trump events.
US Deputy Attorney General Rod Rosenstein stressed that "there is no allegation in this indictment that any American was a knowing participant in this illegal activity".
Some experts said Friday's indictment does not indicate Mueller's probe was broadening. Steve Bannon, former White House chief strategist, was interviewed for 20 hours this week.
The organization described its work as "information warfare against the United States of America", the indictment says.
"Thirteen people carried out interference in the U.S. elections?"
Democratic Senator Mark Warner said the indictment was an important step to hold Russian Federation accountable.
A spokesperson for the Kremlin did not immediately comment, stating they were not familiar with the indictments. Privately, the president has chafed at suggestions that Russian Federation worked to help his campaign, believing they undermine the legitimacy of his victory.
"Russians, thought to be Americans, working with Trump supporters or allies to do politics together", he reiterated.
Last September, after news reports that Mueller was investigating Russian operatives' use of social media for election meddling, the indictment says, one defendant wrote: "We had a slight crisis here at work: the Federal Bureau of Investigation busted our activity". His administration has resisted taking some steps to protect the electoral system from future meddling.