Following the revelation Jeff Sessions recused himself from any probe into the election on Thursday.
Here is what we know so far about presidency the controversy dogging Trump's young How did it all begin?
In October last year, US intelligence agencies publicly blamed Russia for hacking and leaking embarrassing documents from the Democratic Party during the 2016 presidential campaign.
Three months later, on January 6, intelligence chiefs released a limited report stating they were confident that Russian President Vladimir Putin was behind an effort to damage the election chances of Trump's Democratic rival, Hillary Clinton.
The Justice Department and intelligence agencies are continuing to investigate Russia's alleged interference in the campaign.
In Congress, three Senate committees and one House committee have also opened overlapping investigations into multiple aspects of the Russia controversy.
How is Trump involved?
The various congressional inquiries are notably looking into contacts between the Trump campaign and Russian officials, both before and since the November 8 election, to determine whether there was any collusion with Russian attempts to influence the vote outcome.
Several Trump aides had longstanding business links to Russia or Moscow-backed Ukrainian politicians, including his campaign manager Paul Manafort who resigned last August under scrutiny over the issue.
The White House has vehemently denied a New York Times report that Manafort and two others from the campaign communicated with Russian intelligence officials prior to the election.
Late Thursday, Trump accused Democrats of having "lost their grip on reality" and carrying out "a total witch hunt!" in a statement defending Sessions.
What is the fallout so far?
Revelations of sensitive contacts between the Trump team and Russia have already caused one high-profile casualty for the incoming administration.
Congressional inquiries are notably looking into whether Flynn undermined the Obama administration's sanctions on Russia in his discussions with envoy Sergey Kislyak.
On Thursday, Sessions, Trump's attorney general, recused himself from any probe into the presidential election campaign after it was revealed he had failed to disclose his own contacts with Kislyak while testifying in his Senate confirmation hearing.
Trump came to his defense late Thursday, stating that Sessions "did not say anything wrong. He could have stated his response more accurately, but it was clearly not intentional."
As head of the Department of Justice, Sessions oversees any FBI investigations.
In light of the new revelations, politicians from both parties had urged him to recuse himself from probes into the Russian controversy, while top Democrats demanded that he resign.
Democrats fear that Trump's Republicans, who hold a majority in both chambers, will seek to stifle congressional inquiries to protect the president.
Many are now calling for a major bipartisan or independent investigation into Russian interference.
Options could be a powerful independent prosecutor, a select congressional committee, or a bipartisan commission led by experts outside government.
Republicans have so far resisted going beyond the existing committee probes.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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