A group of top Senate Democrats is urging President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE to not meet with Russian President Vladimir Putin one-on-one as the pair prepare to head to Helsinki for a summit on Monday.

Eight Senate Democrats including Minority Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (N.Y.), Minority Whip Dick Durbin Richard (Dick) Joseph DurbinFeinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Grand jury charges no officers in Breonna Taylor death Democrats shoot down talk of expanding Supreme Court MORE (Ill.) and the top Democrats on the Senate Intelligence, Foreign Relations, Judiciary, Armed Services, Appropriations and Banking committees sent a letter to Trump on Saturday making the demand.

"If you insist on meeting Russian President Vladimir Putin in Helsinki, Finland, on Monday, we write to urge that you include senior members of your team and not meet one-on-one with Mr. Putin, as reportedly planned," the group of senators wrote.

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"Mr. Putin is a trained KGB intelligence veteran who will come to this meeting well-prepared. As the Kremlin said last week, a one-one-one meeting with you 'absolutely suits' him. There must be other Americans in the room," they wrote, urging Trump to "rely on the expertise and the experts of the State Department, Defense Department, CIA and other U.S. government agencies" and "not wing it on your own."

The group also called on Trump to address Russian efforts to interfere in the 2016 presidential election on the heels of 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's indictment Friday of 12 Russian intelligence officers who are accused of being behind the 2016 hack of the Democratic National Committee.

"If you are not prepared to make Russia’s attack on our election the top issue you will discuss, then you should cancel the Helsinki summit," the senators wrote to Trump, adding that he "should demand" that Putin hand over the indicted Russians and 13 other Russian nationals previously indicted in February for running a "troll factory" during the election.

"These individuals must be brought to the United States so that they can stand trial, and you should demand that Mr. Putin hand them over," they wrote.

The letter was signed by Schumer, Durbin, Foreign Relations Committee ranking member Bob Menendez Robert (Bob) MenendezKasie Hunt to host lead-in show for MSNBC's 'Morning Joe' Senators ask for removal of tariffs on EU food, wine, spirits: report VOA visa decision could hobble Venezuela coverage MORE (D-N.J.), Intelligence Committee ranking member Mark Warner Mark Robert WarnerDemocrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits Intelligence chief says Congress will get some in-person election security briefings MORE (D-Va.), Judiciary Committee ranking member Dianne Feinstein Dianne Emiel FeinsteinFeinstein 'surprised and taken aback' by suggestion she's not up for Supreme Court fight Democrats shoot down talk of expanding Supreme Court Biden leads Trump by 12 points among Catholic voters: poll MORE (D-Calif.), Armed Services Committee ranking member Jack Reed John (Jack) Francis ReedWhen 'Buy American' and common sense collide Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election Top Democrats press Trump to sanction Russian individuals over 2020 election interference efforts MORE (D-R.I.), Appropriations Committee Vice Chairman Patrick Leahy Patrick Joseph LeahyDemocrats shoot down talk of expanding Supreme Court Battle over timing complicates Democratic shutdown strategy Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election MORE (D-Vt.) and Banking Committee ranking member Sherrod Brown Sherrod Campbell BrownHarris faces pivotal moment with Supreme Court battle Remote work poses state tax challenges Senate Democrats release report alleging Trump admin undermined fair housing policies MORE (D-Ohio).

Trump is slated to travel to Helsinki to meet with Putin on Monday after traveling this week to Brussels for the annual NATO summit and the United Kingdom for a visit.

Trump and Putin are slated to hold a joint press conference on Monday after their meeting, the Finnish government said.

The White House said last month when announcing Trump's summit with Putin that the U.S. president would meet his Russian counterpart in an effort to improve relations between the two countries. Trump has also dismissed concerns that he will be unprepared for the meeting.

"They’re going ‘Will President Trump be prepared, you know, President Putin is KGB and this and that,’ " Trump said during a campaign rally in Montana earlier this month. "You know what? Putin’s fine. He’s fine. We’re all fine. We’re people. Will I be prepared? Totally prepared. I’ve been preparing for this stuff my whole life."

Still, a number of lawmakers, including GOP Sen. John McCain John Sidney McCainThe Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' Cindy McCain: Trump allegedly calling war dead 'losers' was 'pretty much' last straw before Biden endorsement MORE (Ariz.), have pressed Trump to address Russia's election meddling during the bilateral summit.

"President Trump must be willing to confront Putin from a position of strength and demonstrate that there will be a serious price to pay for his ongoing aggression towards the United States and democracies around the world. If President Trump is not prepared to hold Putin accountable, the summit in Helsinki should not move forward," McCain said in a statement Friday.