The number of Americans who approve of President Donald Trump dropped by 3 percentage points to the lowest level of the year following the release of a special counsel report detailing Russian interference in the last US presidential election, according to an exclusive Reuters/Ipsos public opinion poll.

The poll, conducted from Thursday afternoon to Friday morning, is the first national survey to measure the response from the American public after the US Justice Department released Special Counsel Robert Muellers 448-page report that recounted numerous occasions in which Trump may have interfered with the investigation.

According to the poll, 37 per cent of adults in the United States approved of Trump's performance in office, down from 40 per cent in a similar poll conducted on April 15 and matching the lowest level of the year. That is also down from 43 per cent in a poll conducted shortly after US Attorney General William Barr circulated a summary of the report in March.

In his report, Mueller said his investigation did not establish that the Trump campaign had coordinated with Russians. However, investigators did find multiple acts by the President that were capable of exerting undue influence over law enforcement investigations.

While Mueller ultimately decided not to charge Trump with a crime, he also said that the investigation did not exonerate the president, either.

The poll found that 50 per cent of Americans agreed that Trump or someone from his campaign worked with Russia to influence the 2016 election, and 58 per cent agreed that the president tried to stop investigations into Russian influence on his administration.

Read more: Trump feared Russia probe would 'end' presidency, according to Mueller report

Forty per cent said they thought Trump should be impeached, while 42 per cent said he should not.

The poll responses were sharply split along party lines, with Democrats much more critical of Trump than his fellow Republicans.

The Mueller investigation had previously charged 34 other people and three Russian entities, netting convictions or guilty pleas from several Trump associates including former campaign chairman Paul Manafort, White House national security adviser Michael Flynn and longtime personal attorney Michael Cohen.

So far, the report does not appear to have convinced many to change their opinions about the presidents conduct during a bitter presidential campaign, whether his inner circle improperly engaged with Russian agents, or if he tried to interfere with federal investigators afterward.

Among those respondents who said they were familiar with the Mueller report, 70 per cent said the report had not changed their view of Trump or Russias involvement in the US presidential race.

Only 15 per cent said they had learned something that changed their view of Trump or the Russia investigation, and a majority of those respondents said they were now more likely to believe that Trump or someone close to him broke the law.

The Reuters/Ipsos poll was conducted online in English throughout the United States. It gathered responses from 1,005 adults, including 924 who were familiar with the Mueller report. It has a credibility interval, a measure of precision, of 4 percentage points.