US attorney general William Barr’s conclusion that President Donald Trump did not obstruct justice, revealed publicly on Sunday in a letter to lawmakers, reflects inherent difficulties in proving such an obstruction case, legal experts said.

US lawmakers waited on Sunday for details of a confidential report into an investigation of Russian meddling in the 2016 election that has cast a pall over Donald Trump’s presidency and raised questions about possible collusion between the Republican’s campaign and Moscow.

It is not too hard, in this season of pantomime rehearsals, to imagine a script from those masters of the netherworld just beyond the sober, grind-and-queue lives most of us lead — the Coen brothers — constructing a conversation between Vladimir Putin and Xi Jinping. The great filmmakers might contrive to have those unchallengeable leaders discuss the difficulties facing other world leaders.

Scarcely a day passes without ever more extraordinary news from Planet Trump, where the president has been studying the standard of political discourse in the republic and has found it wanting.

The controversial former FBI director James Comey has said he “feels badly” that Hillary Clinton sees him as the main reason she failed to win the US presidency.

Former FBI director James Comey has voiced his concerns about Donald Trump's leadership and his “zero-tolerance” immigration policy along the US-Mexico border which has seen migrant children separated from their parents.

The Taoiseach has met Hillary Clinton in Dublin this evening.

The Oval Office has rarely if ever been occupied by men without blemishes of one kind or another on their character.

Last week, we celebrated one of the great achievements of modern politics in these islands.

Donald Trump is not considering sacking the special counsel investigating Russian election interference, a top White House lawyer said.

Andrew McCabe, the former FBI deputy director fired by the US attorney general, kept personal memos regarding President Donald Trump, according to a source.

A public clash between the US president and the FBI is simmering after the agency said it had "grave concerns" over the accuracy of a classified memo on the Russian collusion probe which Donald Trump wants to be released.

FBI deputy director Andrew McCabe, a frequent target of President Donald Trump's criticism who led the bureau for months last year following the firing of James Comey, is leaving his position.

US president Donald Trump has declared he is "looking forward" to being questioned - under oath - in the special counsel's probe of Russian election interference.

President Donald Trump questioned the impartiality of the deputy director of the FBI, Andrew McCabe, who is planning to retire from the bureau in the months ahead after being buffeted by attacks over alleged anti-Trump bias in the agency.

US President Donald Trump has attacked his own FBI in a series of tweets and said the law enforcement agency's reputation was "in Tatters - worst in History!"

Fired FBI director James Comey has tweeted a Bible passage on the same morning that former national security adviser Michael Flynn pleaded guilty to lying to federal agents.

Lawyers for former national security adviser Michael Flynn have told US President Donald Trump's legal team that they are no longer communicating with them about special counsel Robert Mueller's investigation into Russian election interference.

US President Donald Trump has spoken out about revelations tying Hillary Clinton's presidential campaign to a dossier of allegations about his ties to Russia.

Hillary Clinton's presidential campaign and the Democratic National Committee helped pay for political research into Donald Trump that ultimately produced a dossier of allegations about his ties to Russia, sources say.

Hillary Clinton's presidential campaign and the Democratic National Committee helped fund political research into President Donald Trump that ultimately produced a dossier of allegations about his ties to Russia, a source has said.

Disgraced former US congressman Anthony Weiner should be spared from prison at his sentencing for sexting with a 15-year-old girl who dreamed about affecting the US presidential election, his lawyers said.

The US justice department has said it has no information about wiretaps that President Donald Trump claimed had been made of Trump Tower in New York.

The co-founder of a Washington opposition research firm that produced a dossier of salacious claims involving Donald Trump has spent hours speaking to Senate investigators in a closed-door meeting.

Two members of the US Senate Judiciary Committee have moved to protect special counsel Robert Mueller from being fired by president Donald Trump.

With the sacking of Anthony Scaramucci, General John Kelly showed he meant business, but whether he can control Donald Trump remains to be seem, writes Bette Browne

The US Senate has confirmed President Donald Trump's nominee Christopher Wray to serve as FBI director.

Donald Trump has said he has "complete power" to issue pardons, an assertion that comes amid investigations into Russian interference in last year's presidential election.

JOHN Mindermann is part of an unusual fraternity. A former agent with the Federal Bureau of Investigation (FBI), now 80 and retired in his hometown, San Francisco, he is among the relative handful of law-enforcement officials who have investigated a sitting president of the US.

Republican and Democrat leaders on the House of Representatives Intelligence Committee are threatening a subpoena unless the White House clarifies whether any recordings, memoranda or other documents exist of Donald Trump's meetings with sacked FBI director James Comey.

Congress is controlled by Republicans, and would not impeach him even if he was linked to alleged Russian interference in the US general election, says Elizabeth Drew.

"Lordy, I hope there are tapes," Mr Comey declared at a congressional hearing.

President Donald Trump has appeared to cast doubt on the assessment of 17 US intelligence agencies that blame Russia for election meddling, questioning why the Obama administration did not try to stop it.

Some Republican senators these days seem to be playing the Bad Guy in such an obvious way, they make the A-Team look like The Wire, writes Colm O’Regan

Donald Trump has appeared to confirm he is under investigation for obstruction of justice, claiming he is being probed for firing FBI director James Comey by the man who told him to do it.

The special counsel appointed to investigate Russian influence in the 2016 US presidential campaign is now examining whether Donald Trump tried to obstruct justice, according to a report.

US attorney general Jeff Sessions has agreed to appear before the Senate intelligence committee as it investigates alleged Russian meddling in the presidential election.

Financial companies have led US stock indexes upwards, nudging the Nasdaq composite index to a record high.

This is Trump's first response to Comey's testimony

Russian officials have vehemently denied any role in hacking attacks on the Democratic National Convention and voter-registration databases.

Here's what you need to know.

It is less than five months since Donald Trump was sworn in as president but even in that time he and his billionaires’ junta have made fundamental changes to the relationships that sustained American hegemony and, more often than not, championed the liberal, tolerant values that defined the Western world.

US President Donald Trump has said he and his supporters "are under siege" but "will come out bigger and better and stronger than ever".

Twitter users have latched on to former FBI director James Comey's use of the word "lordy" during his Capitol Hill testimony about his interaction with US President Donald Trump.