US Attorney General Jeff Sessions came under fire late Wednesday after the Washington Post reported he met twice last year with Russia's ambassador to Washington, seemingly contradicting statements he made in Senate confirmation hearings in January.
The revelation cast a fresh cloud over President Donald Trump's administration, which has repeatedly denied any suspected ties between members of his election team and Russia, which US intelligence says interfered in the 2016 campaign against Hillary Clinton.
The White House quickly labelled the report an attack by partisan Democrats, confirming the meetings but arguing Sessions did nothing wrong.
In a statement Sessions, the Trump administration's top law enforcement official, said: "I never met with any Russian officials to discuss issues of the campaign. I have no idea what this allegation is about. It is false."
Senator Jeff Sessions, asked if #SallyYates would say "no" if @POTUS asked her to do something improper. She said no. Then they fired her. pic.twitter.com/AlGqC9mSBr — Bryan Dawson (@BryanDawsonUSA) March 2, 2017
Nancy Pelosi, the top Democrat in the Senate, called for Sessions to step down. "After lying under oath to Congress about his own communications with the Russian, the attorney general must resign," she said.
Democrat Elijah Cummings of the House of Representative's Oversight Committee echoed that call in a statement. "When Senator Sessions testified under oath that 'I did not have communications with the Russians,' his statement was demonstrably false, yet he let it stand for weeks," Cummings said.
"Attorney General Sessions should resign immediately, and there is no longer any question that we need a truly independent commission to investigate this issue."
A White House official dubbed the latest report an "attack." "This is the latest attack against the Trump administration by partisan Democrats," the official said.
"Sessions met with the ambassador in an official capacity as a member of the Senate Armed Services Committee, which is entirely consistent with his testimony."
Republican Senator Lindsey Graham called for answers on Russian ties but cautioned that contacts between the Trump campaign and Moscow "may be legitimate."
"If there were contacts between the Trump campaign and Russian officials, they may be legitimate; they may be okay. I want to know what happened between the Trump campaign, the Clinton campaign, and the Russians," Graham said at a CNN town hall Wednesday night.
Sessions was confirmed as attorney general on February 8, moving in place to oversee Justice Department and Federal Bureau of Investigation probes into the alleged communications between Trump campaign officials and Moscow.
The New York Times reported two weeks ago, citing US intelligence sources, that three campaign staff, including campaign chief Paul Manafort, had communicated with Russian intelligence officers.
The White House also labelled that report "false" and has accused Democrats, the media and the intelligence community of a political effort to undermine the Trump administration.
The Washington Post report emerged as Democrats had begun warning the White House and Republican lawmakers against trying to shut down any investigations of alleged Russian interference.
Illegal under U.S. law to conduct diplomacy if you're not in government. If top legal official #JeffSessions did this & lied, v. serious.— John Simpson (@JohnSimpsonNews) March 2, 2017
The warnings came after Trump's staff sought to enlist the FBI, reportedly the CIA and two Republicans who head committees leading the Russia investigations, to knock down media reports on the alleged links.
US intelligence chiefs announced in December that they had concluded that Russian President Vladimir Putin was behind a hacking and misinformation campaign to hurt Clinton and boost Trump's chances to win the November 8 presidential election.
But they have not made their evidence public, and the Kremlin denies it.