President Donald Trump's approval rating has hit an all-time low, according to a newly released poll by Marist.

Only 35% of Americans approve of Trump's job performance, while another 55% disapprove of how he is leading the country. The findings are the highest negative rating Trump has received by Maris, The Hill reported.

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While the president remains popular with his key base supporters, the new poll shows his support waning among Americans who identify as strong Republicans.

In June, 91% of Republicans approved of his performance but that number has dropped to 79% in the new poll.

More than twice as many Americans said they strongly disapprove of the president's job performance at 42% than those who said they strongly approve at 20%.

According to The Hill, former President Obama had much stronger numbers around the same time of his presidency, with 55% approving of his job performance and 35% disapproving.

The poll found that more Americans have an unfavourable view of the president, at 60%, than have a favourable view of him, at 34%. Fewer Americans who identify as strong Republicans have a favourable view of Trump, down to 80% now from 94% in June.

"While Republicans are still largely in Trump's corner, the cautionary tale for the president lies in the softening of support at his base," said Dr Lee Miringoff, director of the Marist College Institute for Public Opinion. "Since his numbers among Democrats and independents are weak, a crack among his most ardent supporters is something Trump can ill afford."

According to The Hill, Trump's approval rating also dropped to its lowest level in the Gallup poll released Monday (14 August). Only 34% of Americans polled by Gallup said they approved of Trump's performance, while 61% said they disapproved.

The Marist poll was conducted between 8 August and 12 August, the day violence erupted during a white supremacy rally in Charlottesville, Virginia that ended in the deaths of three people.