Rosenstein said he had briefed President Trump on the indictment earlier this week, adding that although Americans corresponded with the indicted Russians, in this case no Americans knowingly conspired with Russian intelligence officers. The Kremlin denies it interfered.
CNN's Russia investigation reporter Marshall Cohen said, by CNN's count, that Mueller has filed "191 criminal charges against 35 defendants", including "112 new charges brought today against a dozen Russian operatives for hacking".
"There's no allegation in this indictment that any American citizen committed a crime".
When asked if he has given Putin the advantage going into the meeting by challenging long-standing Western alliances, Trump said his administration has been "far tougher on Russian Federation than anybody".
The indictment was announced at nearly exactly the moment that Trump rolled into the quadrangle of Windsor Castle to meet the awaiting Queen Elizabeth II in the symbolic highpoint of his visit to Britain.
"Will be at Trump Turnberry for two days of meetings, calls and hopefully, some golf - my primary form of exercise!"
The claims were "an old duck" and a "heap of conspiracy schemes", said Moscow's foreign ministry in a statement.
The call to cancel the summit came after a week in which Democrats have expressed widespread concerns about Trump's ability to sit down and challenge Putin in a one-on-one meeting, which is scheduled for Monday.
"The goal of this "information attack" is obviously to spoil the atmosphere prior to the Russian-American summit", the ministry said in a statement, referring to the forthcoming meeting between Russian President Vladimir Putin and USA leader Donald Trump.
Although it seems unlikely that the Republican effort to impeach Rosenstein will get the steam it needs in the coming days, but in case House Republicans are able to build support for it, the political drama surrounding the Russian Federation investigation, which Donald Trump has called a "witch hunt" as late as Friday, will get exacerbated in ways we may not be able to foresee.
Williams vs Kerber in #Wimbledon ladies' final
She got past Germany's Görges without really breaking sweat and has enough energy to take on the next German in line. Moments later, Serena's misery was complete as a tame return left Kerber wiping away tears of joy.
North Atlantic Treaty Organisation allied leaders, who Trump met with in Brussels earlier this week, are skeptical about whether he will be firm enough with the Russian leader, who has denied the USA intelligence community's conclusion that Russia interfered in the election with the intent of helping Trump win.
The indictment alleges that Guccifer 2.0 was in touch with multiple Americans in the summer of 2016 about the pilfered material, including an unidentified congressional candidate who requested and then received stolen information.
As of Friday, the inquiry has indicted 32 people - mostly Russian nationals in absentia - as well as three companies and four former Trump advisers. "The person responded, "(p) retty standard". WikiLeaks posted many hacked Democratic documents.
According to a copy of the indictment obtained by Bleeping Computer, the 12 accused are part of Unit 26165 and Unit 74455 of the Russian government's Main Intelligence Directorate (GRU), the country's military intelligence service.
"The open question is whether Americans were involved in this and will they be charged".
Trump's lawyer, Rudy Giuliani, said on Twitter that the indictments were "good news for all Americans".
Mueller's indictment states that later that very night, Russian hackers became much more brazen: they "attempted after hours to spearphish for the first time email accounts at a domain hosted by a third-party provider and used by Clinton's personal office".
Senate Minority Leader Chuck Schumer, meanwhile, issued a statement saying the meeting should not go ahead until "Russia takes demonstrable and transparent steps to prove that they won't interfere in future elections".
The GRU officers named in Friday's Mueller indictment didn't just target individuals.
They are accused of releasing the stolen emails on the web.