(CNN) Senate Democrats emerged from a classified election security briefing Wednesday complaining the Trump administration is still not doing enough to thwart foreign actors like Russia from interfering in the 2020 US elections and Senate Republicans are not doing enough to beef up election security laws.

"Interference in our elections is a very, very serious problem and it is obvious we have to do a lot more at both the public sector and private sector levels to combat it," said Senate Minority Leader Chuck Schumer, a New York Democrat, after the all-senators briefing. "I am very worried about what the Russians and others might do in 2020."

Democratic Sen. Chris Murphy of Connecticut said he believes President Donald Trump is reluctant to firmly hold Russia and President Vladimir Putin accountable for interference in 2016.

"We have a president who is actively undermining election security efforts and a lot of people working at the top of these agencies who are trying to do the right thing," Murphy said.

The briefing was led by Director of National Intelligence Dan Coats, FBI Director Chris Wray, acting Homeland Security Secretary Kevin McAleenan and other officials. They briefed the full House before meeting with the senators.

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