"President Trump should cancel his meeting with Vladimir Putin until Russian Federation takes demonstrable and transparent steps to prove that they won't interfere in future elections", Senate Minority Leader Chuck Schumer of NY said in a statement.
A growing chorus of top congressional Democrats urged Trump to cancel the event, even as some Republicans said the president should use the opportunity to confront Putin firmly about Russian interference in the 2016 US presidential election.
A federal grand jury on Friday indicted the Russian intelligence officers on charges of hacking the computer networks of 2016 Democratic presidential candidate Hillary Clinton and the Democratic Party.
The announcement that Mueller obtained indictments of the 12, all members of Russia's military intelligence agency, came three days before Trump and Putin are to meet.More news: Wimbledon 2018: Serena Williams to face Angelique Kerber in women's final
Twelve Russian intelligence officers were indicted on charges they hacked into Democratic email accounts during the 2016 USA presidential election and released stolen information in the months before Americans headed to the polls, the Justice Department said Friday.
Senator Lindsey Graham (R- SC) is a bit at odds with some of his Senate colleagues on whether President Donald Trump should proceed with the Vladimir Putin summit after today's indictments.
The Kremlin has denied that the Russian government interfered in the US election.
The Republican senator from Arizona released a statement praising the charges, which arose out of Special Counsel Robert Mueller's investigation of Russian interference in the election. It also sidesteps condemning the Russians' alleged crimes.More news: Trump Attacks CNN, NBC in Joint Press Conference With British Prime Minister
Deputy Attorney General Rod Rosenstein said Friday at the Department of Justice that he briefed Trump on the coming indictments earlier this week.
Hours before the Justice Department announcement, Trump complained anew that the special counsel's investigation is complicating his efforts to forge a better working relationship with Russian Federation.
"Going forward, there should be no one-on-one meeting between this president and Mr. Putin", Warner told reporters on Capitol Hill.
"President Trump's continued refusal to condemn the Russians' attacks on our democracy, even after Special Counsel Mueller indicted 12 Russian intelligence officials for interfering in the 2016 election, makes it clear that meeting with Putin would be both pointless and unsafe", Pelosi said.More news: Liverpool sign Shaqiri from Stoke in £13.5m deal
"Cancel your ridiculous Putin summit and get your butt back on a plane to the United States", tweeted Sen.