James Comey tweets a photo of himself in a forest after the Mueller report is ...

Former FBI Director James Comey tweeted an image of himself in a forest surrounded by trees with the caption 'so many questions' on Sunday.

The cryptic tweet was sent after the attorney general sent a letter to Congress sharing the findings of special counsel Robert Mueller's investigation.

Attorney General William Barr told Congress that Mueller did not find evidence that that the Trump campaign conspired or coordinated with Russia to interfere in the 2016 presidential election.

The letter also said that Mueller and his team had not reached a conclusion on whether Trump obstructed justice while being president. 

Barr added that he and Deputy Attorney General Rod Rosenstein had decided not to pursue an obstruction charge after reviewing the special counsel's findings.

Democrats say they want more answers from Barr on Mueller's findings and how Barr and Rosenstein made their decision on not pursuing obstruction charges.

The president's critics had long pointed to his firing of Comey as evidence of possible obstruction. The firing led to the appointment of Mueller as special counsel.

Since being fired, Comey has been a frequent public critic of Trump with him frequently calling him out at times on social media.

Comey's tweets are often cyptic, with quotes from historical figures or photographs of the former FBI chief from his travels.  

Attorney General Barr said in a three-page memo to top-ranking lawmakers on the committees with oversight over the Justice Department that he is still reviewing Robert Mueller's findings.

He said he could reveal, however, that special counsel says of obstruction ' ' While this report does not conclude that the President committed a crime, it also does not exonerate him.' '

The burden, therefore, lay with the attorney general to determine if Trump's actions were criminal, and Barr told lawmakers on Sunday afternoon that it was his assessment that the evidence Mueller provided was 'not sufficient to establish that the President committed an obstruction-of-justice offense.'

He said he made the decision in concert with Deputy Attorney General Rod Rosenstein, and it was not 'based on' the implications of indicting a sitting president.  Rather, they concluded after reviewing Mueller's work they could not prove 'beyond a reasonable doubt' that Trump intended to obstruct justice.

Democrats immediately suited up for a new fight with Trump and his hand-picked attorney general.

'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,' Nadler said in a tweet.

House Democratic Caucus Chairman Hakeem Jeffries likewise said that Barr must submit to a congressional grilling.

'Mueller conducted twenty-two month investigation. He did not exonerate on Obstruction of Justice. But Trump-appointed AG takes only two days to clear Individual 1?' he said. 'Bill Barr must release entire and testify before Congress. Immediately.' 

Democratic Congressman Sean Patrick Maloney said he'd prefer to hear from Mueller himself for the same reason.

'Would rather have the report from the guy who spent two years investigating than a summary from the guy who spent less than two days reading it. Need the whole thing,' the New York congressman said in a tweet.

The president and the White House were already at work driving a narrative that Trump was 'exonerated' based on Barr's second-hand description of the special counsel's findings.

'There was no collusion with Russia. There was no obstruction, and none whatsoever,' he told reporters on the tarmac before a flight from his weekend resort. 'And it was a complete and total exoneration.'

House Speaker Nancy Pelosi and Senate Minority Leader Chuck Schumer said in a joint statement that Trump's claim 'is not to be taken with any degree of credibility' as they reiterated an earlier call for total transparency in the special counsel investigation.

'Attorney General Barr's letter raises as many questions as it answers. The fact that Special Counsel Mueller's report does not exonerate the president on a charge as serious as obstruction of justice demonstrates how urgent it is that the full report and underlying documentation be made public without any further delay,' the Democrats wrote. 'Given Mr. Barr's public record of bias against the Special Counsel's inquiry, he is not a neutral observer and is not in a position to make objective determinations about the report.' 

They said: 'Congress requires the full report and the underlying documents so that the Committees can proceed with their independent work, including oversight and legislating to address any issues the Mueller report may raise. The American people have a right to know.'

Rep. Mark Takano of California noted that the House of Representatives unanimously passed a resolution to make the Mueller report public prior to its completion. 

'This is about transparency and truth — and a 4 page summary from Trump's AG doesn't cut it. The American people deserve to see the whole thing,' he said. 

Barr's allegiance to the president who appointed him had some Democrats arguing on Sunday evening that DOJ must provide the Mueller report and other documents to Congress immediately.

'Maybe Barr's interpretation is right. Maybe it's not. But why the heck would we be ok with an ally of President, appointed because of his hostility to the Mueller investigation, tell us what the report says? Give Congress the report. Give the public the report. Now,' said Connecticut Sen. Chris Murphy in a tweet.

Colleague Richard Blumethal, also of Connecticut, said, 'Key questions remain about whether Donald Trump was compromised

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