Later today US Attorney General William Barr is due to release a redacted version of the Mueller report.

Mr Barr received the 400-page report last month and published a four page summary on 24 March.

On the issue of collusion, Donald Trump was cleared.

Key findings of the Mueller report

Quoting directly from the Mueller Report, Mr Barr said that the Special Counsel's investigation "did not establish that members of the Trump campaign conspired or coordinated with the Russian government in its election interference activities."

On the issue of obstruction, the report was less conclusive. 

According to the Attorney General, the Special Counsel did not draw a conclusion one way or another as to whether there was obstruction.

Mr Mueller found that "while this report does not conclude that the president committed a crime, it also does not exonerate him". 

The Special Counsel left it up to the Justice Department to decide if there should be charges or follow-up investigations relating to obstruction but the Attorney General said this would not be happening. 

Mr Barr said that the evidence outlined in Mr Mueller's report was "not sufficient to establish that the President committed an obstruction-of-justice offence."

Mr Trump immediately jumped on the findings contained in the Attorney General’s summary and declared that he was "totally exonerated".

Democrats were quick to point out that this was simply not true when it came to obstruction and within minutes of the release of the summary, there were calls for the full Mueller report to be published.

The president’s political opponents highlighted the fact that the Attorney General, who decided not to pursue charges or a follow-up investigation, is a Trump appointee.

They also wanted to learn more about why Robert Mueller couldn’t make up his mind on the issue of obstruction.

Why wasn’t it as clear-cut as the collusion issues? What evidence did the Special Counsel uncover that caused him concern?

It’s not clear if these questions will be answered with the release of the Mueller report later today because the publication will be redacted.

Sensitive information will be censored and a colour-coding system will be used to explain the reason for each redaction.

Material will be withheld if it’s been presented to a grand jury, if it compromises sensitive sources, if it could potentially damage other ongoing investigations or if it would unfairly impact on the reputation or privacy of peripheral third parties.

Mr Trump’s political opponents fear today’s report will be a multicoloured affair with lots of redactions. 

If it is, Democrats will no doubt use some colour-coding of their own and accuse the Attorney General of engaging in an information blackout and a whitewash.