More than 6 in 10 millennials disapprove of President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE’s job performance, according to a new poll.

Sixty-six percent of 18- to 29-year-olds dislike Trump’s work so far, according to a Harvard Kennedy School Institute of Politics survey released Tuesday.

Pollsters also found most would give Trump an “F” for his time in the White House so far.

Forty-one percent assign Trump that grade, with 15 percent giving him a “D” and 14 percent a “C.”

Eighteen percent say Trump deserves a “B” grade, while 10 percent believe he earns an “A” instead.

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Thirty-two percent approve of Trump’s leadership before his 100th day in office this Saturday.

Tuesday’s results additionally discovered nearly 70 percent of participants find Trump’s use of Twitter inappropriate.

Sixty-eight percent said Trump’s Twitter habit is “not appropriate,” while 11 percent said it was “appropriate” and 20 percent were unsure.

Trump is struggling with low approval ratings in several polls ahead of the 100-day benchmark.

Gallup said last week that Trump’s average approval rating is the lowest since the polling firm began conducting presidential approval surveys in 1953.

Trump’s approval rating has averaged about 41 percent, according to Gallup, with his low hitting 39 percent in January.

Gallup said the historical average approval rating of presidents at this point in their tenure is 61 percent, giving Trump the lowest approval rating of any president in their first quarter it examined.

The Harvard Kennedy School’s Institute of Politics conducted its latest survey of 2,654 18- to 29-year-olds via online interviews from March 10 to 24. It has a margin of error of 2.7 percentage points.