Former FBI Director James Comey defended the Russia investigation in heated testimony before the Senate Judiciary Committee.

Former FBI Director James Comey faces questioning from the Republican-led Senate Judiciary Committee about his role in leading the bureau’s investigation into ties between the 2016 Trump campaign and Russia

House Intelligence Committee Chairman Adam Schiff says he will subpoena the Department of Homeland Security after a department whistleblower said he wasn’t allowed access to documents and clearance he needs to testify

HBO’s two-part film “Agents of Chaos” looks at how a whole bunch of Russian dirty tricks helped Donald Trump into the White House

The prosecutor looking into the origins of Russia probe resigns.

A federal prosecutor who was helping lead the investigation into the origins of the Trump-Russia probe has resigned from the Justice Department

Giuliani said he had "no reason to believe [Derkach] is a Russian agent."

The U.S. government leveled new accusations of election interference and among those named is a Russian agent who met with President Donald Trump’s personal attorney Rudy Giuliani.

ABC News’ Pierre Thomas reports on new sanctions from the U.S. Treasury Department against four Russia-linked actors working to interfere in the 2020 election.

Russia's most prominent opposition leader, Alexey Navalny, has been taken out of a medically-induced coma at the German hospital where he's being treated.

The Department of Homeland Security said that Russia is trying to “undermine public trust in the electoral process” by spreading disinformation about mail-in voting.

Former CIA Director John Brennan has been interviewed by U.S. Attorney John Durham’s team as part of its inquiry into the Russia investigation

A former FBI lawyer has pleaded guilty to altering a document related to the secret surveillance of a former Trump campaign adviser during the Russia investigation

Attorney General Barr said a new "development" would be coming Friday from the U.S. attorney he has tasked with investigating the Russia probe.

A new bipartisan report released by a Senate panel Tuesday outlines perhaps the most detailed accounting to date of Russia’s efforts to interfere in the 2016 election.

The report concluded that the 2016 Trump campaign had repeated contacts with Russian operatives, and said campaign chairman Paul Manafort “represented a grave counterintelligence threat.”

The Senate intelligence committee has concluded the Kremlin launched an aggressive effort to interfere in the 2016 presidential contest on behalf of Donald Trump

A federal court ruled Friday that House Democrats can sue to enforce a subpoena for testimony from former White House counsel Don McGahn.

Former deputy attorney general Sally Yates pushed back against Republicans' criticism of the origins of the Russia investigation in a Senate hearing Wednesday.

Democrats concerned about foreign campaign to influence the 2020 election.

The Justice Department has made public President Trump's order commuting the prison sentence for his longtime friend and adviser Roger Stone.

After Roger Stone received a full-sentence commutation from President Donald Trump, the veteran GOP political operative told ABC News he's feeling good.

A lead prosecutor for special counsel Robert Mueller has a book coming about the two-year investigation into the alleged ties between Russia and the presidential campaign of Donald Trump

President Trump commuted Stone’s 40-month sentence against the advice of some aides.

The Powerhouse Roundtable breaks down the latest on the George Floyd protests on "This Week."

Mueller sharply defends investigation into ties between Russia, Trump campaign.

The Supreme Court is denying Congress access to secret grand jury testimony from special counsel Robert Mueller’s Russia investigation through the November election

The Russian ransomware group Evil Corp is retaliating against the United States.

The Kremlin ally indicted last week as a key figure in Russia's online election influence operation is also tied to a shadowy military contractor.

Trump retweeted a petition to pardon Roger Stone, fueling speculation that the president plans to pardon him.

The surprise ruling came as the trial judge had questioned the DOJ's move.

Aaron Zelinksy was one of four attorneys who resigned from the Justice Department's prosecution of President Donald Trump's longtime friend and adviser Roger Stone.

A group of Russians travels to the country's far north to practice free diving, an already very dangerous extreme sport, under the Arctic ice.

A prosecutor on the Roger Stone case is expected to tell Congress President Donald Trump’s longtime friend was given favorable treatment before his sentencing. ABC News’ Alex Presha reports.

A federal appeals court appears skeptical of arguments that it should order the dismissal of the criminal case against former Trump administration national security adviser Michael Flynn

A federal appeals court heard arguments Friday as it considers whether to throw out the criminal case against former national security adviser Michael Flynn.

Tempers flared Thursday as GOP senators sought unilateral subpoena power in their probe of the Russia investigation.

Former deputy attorney general Rod Rosenstein is expected to face tough questions from Senate Republicans over his role in the Russia investigation.

Former Deputy Attorney General Rod Rosenstein faced a grilling from Senate Republicans Wednesday over new revelations regarding the Russia probe’s origins.

Acting DNI Richard Grenell has “started the declassification” process of transcripts and reports documenting Michael Flynn’s conversations with the Russian ambassador.

Senate Majority Leader Mitch McConnell gave a full-throated endorsement of an aggressive Senate Republican investigation of the Mueller probe.

The federal judge overseeing the Michael Flynn case has appointed an outside judge to consider whether to hold Flynn in criminal contempt for perjury.

Republicans have released a declassified list of Obama-era officials who the NSA said may have received Michael Flynn's identity through so-called 'unmasking' requests.

Federal judge Emmett Sullivan took the rare step after the Justice Department concluded that Flynn’s lies to the FBI about his contacts with a Russian ambassador were not “material.”

President Trump's former campaign chairman was released from prison because of concerns over the novel coronavirus, sources told ABC News.

Acting DNI Grenell has sought to declassify a list of former Obama administration officials who were allegedly involved in the so-called 'unmasking' of Michael Flynn.

Legal experts told ABC News that the sequence of events around Flynn's case -- which they described as without clear precedent, raises significant questions.

The Justice Department concluded that Michael Flynn’s prosecution for lying about communication with a Russian ambassador was “unjustified” and that the lie he told the FBI was “not material.”

The Department of Homeland Security and FBI warned states earlier this year that Russia could look to interfere in the 2020 U.S. elections by covertly advising political candidates and campaigns

Michael Cohen will not be released early from prison to home confinement over coronavirus concerns.