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Donald Trump continues to face criticism over his handling of the coronavirus outbreak, with 2020 rivals Bernie Sanders and Joe Biden both going after him on Sunday and the former saying it was “pathetic” the president was “running into South Carolina trying to steal some media attention away from Democrats” in a time of international crisis.

A new national poll has meanwhile found Trump losing the presidential race to whomever the Democratic nominee proves to be by seven points, as the field narrows further with Pete Buttigieg joining Tom Steyer in ending his campaign for the White House ahead of Super Tuesday.

Amy Klobuchar also ended her campaign on Monday, just a day before those elections, and announced she would be endorsing Mr Biden's candaidacy.

Shortly after, Mr Buttigieg also announced his endorsement of Mr Biden, and the two midwestern former candidates were expected to hit the campaign trail with the former vice president in Texas.

On Twitter, the president has kept up his attacks on his many media and political enemies, singling out Michael Bloomberg and Chuck Todd – who took vice president Mike Pence to task on NBC’s Meet the Press on Sunday over his attack on “irresponsible rhetoric” against the administration – for particular vitriol.

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