It's a shame your President had to go through this: Trump following Mueller revelations

US President Donald Trump claimed vindication on Sunday after Attorney General William Barr submitted his summary of Special Counsel Robert Mueller's investigation to the US Congress.

Culminating his investigation, Mueller found that neither Trump nor any of his associates conspired with the Russians to influence the 2016 Presidential elections which saw the business magnate rise to power as the 45th President of the United States.

"No Collusion, No Obstruction, Complete and Total EXONERATION. KEEP AMERICA GREAT!" Trump tweeted immediately after Barr's summary was made public.

Speaking to reporters here, Trumps said: "So after a long look, after a long investigation, after so many people have been so badly hurt, after not looking at the other side where a lot of bad things, a lot of horrible things happened, a lot of very bad things happened for our country, it was just announced there was no collusion with Russia - the most ridiculous thing I've ever heard. There was no collusion with Russia. There was no obstruction and none whatsoever."

"It's a shame our country had to go through this. To be honest, it's a shame your President had to go through this," he remarked.

Mueller, however, has not completely exonerated Trump on obstruction of justice charges, leaving it to the Attorney General to take a final call on that.

It is Trump-appointed Barr, along with Deputy Attorney General Rod Rosenstein, who outlined that the evidence in the Mueller investigation is not enough for a criminal case against the President.

While the Republicans have wholly welcomed Barr's summary on Mueller's findings, Democratic leaders have alleged discrepancies and called for the release of the complete Mueller report.

"There must be full transparency in what Special Counsel Mueller uncovered to not exonerate the President from wrongdoing. DOJ owes the public more than just a brief synopsis and decision not to go any further in their work," US House Committee on the Judiciary's Chairman Jerrold Nadler tweeted.

"In light of the very concerning discrepancies and final decision making at the Justice Department following the Special Counsel report, where Mueller did not exonerate the President, we will be calling Attorney General Barr in to testify before @HouseJudiciary in the near future," he added.

The 22-month long Mueller investigation - the final report of which was submitted to Barr on Friday - interviewed about 500 witnesses and obtained more than 3,500 subpoenas and warrants of various types. 13 requests to foreign governments for evidence were also made as part of the massive investigations.

While there are no further indictments, the investigation saw charges being filed against 37 defendants, seven guilty pleas and one conviction.

The process to release further information from Mueller's report has begun at the Department of Justice, according to Barr, who added that the Special Counsel would also be involved in the scrubbing of the report.