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

According to the poll, 37 percent of adults in the United States approved of Trump’s performance in office, down from 40 percent in a similar poll conducted on April 15 and matching the lowest level of the year. That is also down from 43 percent in a poll conducted shortly after U.S. 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.”