“It has been clear to everyone (except Donald Trump) that Russia was deeply involved in the 2016 elections and intends to be involved in the 2018 elections. It is the American people who should be deciding the political future of our country, not Mr. Putin and the Russian oligarchs,” Sanders said in a statement. “It is absolutely imperative that the Mueller investigation be allowed to go forward without obstruction from the Trump administration or Congress.”

Sanders’ urging that special counsel Robert Mueller be protected echoes the concerns of Democrats across Capitol Hill.

The independent senator’s statement came shortly after Mueller indicted 13 Russian individuals and three Russian entities for helping the Kremlin interfere in the last presidential election starting as early as 2014.