Washington (CNN) Sen. Kamala Harris sent a letter to the Justice Department's inspector general on Friday, requesting an investigation into whether Attorney General William Barr has acted upon requests or suggestions from President Donald Trump or other White House officials to investigate the President's "perceived enemies."

In a letter addressed to Department of Justice Inspector General Michael E. Horowitz, the Democratic presidential candidate cites the findings in special counsel Robert Mueller's report and Barr's Wednesday congressional testimony as the reasons for her letter.

"Such inappropriate requests by the President have been well documented," Harris wrote. "Special Counsel Mueller ... documented a disturbing pattern of behavior on the part of the President -- repeated attempts to target his perceived opponents."

"There must be no doubt that the Department of Justice and its leadership stand apart from partisan politics, and resist improper attempts to use the power of federal law enforcement to settle personal scores," the letter reads.

Harris' letter comes days after a heated exchange between the California Democrat and the attorney general, in which Barr parsed words to answer Harris' question about whether the White House has "asked or suggested" that he open an investigation into anyone.

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