A group of top Democratic senators formally requested on Friday that President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE provide Congress with a full report about the nerve agent attack on a former Russian spy in the United Kingdom.

The lawmakers, who all sit on key national security committees, say that Trump should impose sanctions on the Kremlin if the U.S. concludes that the Kremlin was behind the poisoning of former Russian spy Sergei Skripal and his daughter Yulia with a chemical weapon.

“We formally request a determination of whether a foreign government has used lethal chemical or biological weapons in violation of international law and a report to Congress analyzing the attack,” the senators wrote in a Friday letter addressed to the president.

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Senators who serve as the top Democrats on five different Senate committees signed the letter, including the Foreign Relations Committee’s Sen. 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 (N.J.), Judiciary Committee’s Sen. Dianne Feinstein Dianne Emiel FeinsteinBiden leads Trump by 12 points among Catholic voters: poll Names to watch as Trump picks Ginsburg replacement on Supreme Court McConnell says Trump nominee to replace Ginsburg will get Senate vote MORE (Calif.), Appropriations Committee’s Patrick Leahy Patrick Joseph LeahyBattle 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 Top Democrats press Trump to sanction Russian individuals over 2020 election interference efforts MORE (Vt.), Armed Services Committee’s 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 (R.I.) and Intelligence Committee’s Sen. Mark Warner Mark Robert WarnerIntelligence chief says Congress will get some in-person election security briefings Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' House approves bill to secure internet-connected federal devices against cyber threats MORE (D-Va).

Senate Minority Whip Dick Durbin Richard (Dick) Joseph DurbinTumultuous court battle upends fight for Senate McConnell focuses on confirming judicial nominees with COVID-19 talks stalled Senate Republicans signal openness to working with Biden MORE (D-Ill.) also signed the letter.

The call for a comprehensive analysis — which comes after the U.S. and France joined the U.K. in blaming Russia for the attack — signals that Democrats want to slap Russia with consequences for the attack.

The Kremlin has denied responsibility for the attack

In an address to Parliament earlier this month, British Prime Minister Theresa May said the U.K. government had determined the Russian government was likely behind the attack, pointing to the assessment of Moscow’s chemical weapons capabilities and its record of signing off on former intelligence officers' death warrants.

U.K. officials announced that a highly lethal chemical agent was used in the attack. Known as Novichok, the chemical is known to be a military-grade nerve agent that the Kremlin develops, officials said.

“Given the use of such a dangerous nerve agent, as well as the origins of the substance, we believe a comprehensive analysis of this chemical attack is vital to uncovering the perpetrators and, if necessary, you should impose sanctions on the individuals and entities involved,” the lawmakers’ letter continues.

Concern about Russia’s aggressiveness in other countries continues to run high on Capitol Hill.

Lawmakers on both sides of the aisle largely agree that the Kremlin sought to sow discord and meddle in the 2016 presidential election and will likely strike again in the upcoming 2018 midterm elections.

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, who is investigating Russian interference, indicted 13 Russian nationals and three Russian groups earlier this year for their efforts to conduct "information warfare" in the U.S. during the election, through social media and other sophisticated measures.

While the Trump administration has issued some punishment on Moscow for meddling, Trump has largely avoided criticizing Russian President Vladimir Putin in public.