Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) on Sunday blasted President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE for not taking action to protect the U.S. from Russian meddling in future elections, saying "that we don’t have a president speaking out on this issue is a horror show."

His comments follow an indictment released Friday by special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE outlining multiple actors who played a role in extensive Russian efforts to interfere in the 2016 election.

"We have got to bring Democrats and Republicans together despite the president to go forward to protect the integrity of American democracy,” Sanders said on NBC's “Meet The Press.”

The Department of Justice announced charges against 13 Russian nationals and three Russian organizations for allegedly attempting to interfere in the 2016 election. The indictment alleges the goal of the Russians was to support then-candidate Donald Trump, and damage his opponent, Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE.

Following the indictment, Trump has sent roughly a dozen tweets about the Russia investigation, claiming his campaign did not collude with Russia and blaming the Obama administration for not doing more. He also said the indictment vindicated him and his campaign from allegations of collusion with Moscow.

Sanders said Sunday that former President Obama should have done more to push back against Russian interference in 2016, but acknowledged Obama was in a difficult position.

“The main point to be understood is that what everyone understands, except Donald Trump, is that this was not just the 2016 campaign. They intend to do this in 2018,” Sanders said.

“And I think one of the weirdest things in modern American history is you have every intelligence agency, you have the Mueller report, you have Trump’s own administration saying [the Russians] want to sabotage the 2018 campaign. Everybody knows this, except the president of the United States,” he continued.