President Donald Trump called off campaign events in Colorado, Wisconsin and Nevada, late Wednesday, as the coronavirus crisis continued to worsen across the United States. There are now over 1030 confirmed cases in at least 36 states, according to data from John Hopkins University.

Trump was lined up to leave Thursday for the campaign events in the 2020 general election battleground states. Trump made the announcement Wednesday after his prime time Oval Office speech, in which he declared that the U.S. would bar travel from Europe for the next 30 days.

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“Out of an abundance of caution from the Coronavirus outbreak, the President has decided to cancel his upcoming events in Colorado and Nevada,” Stephanie Grisham, White House press secretary, said in a statement.

Former Vice President Joe Biden and Sen. Bernie Sanders also canceled events on the night of the mini Tuesday primaries in six states. Biden has also canceled two fundraisers and a Chicago rally in the days before the Illinois primary.

The Democratic National Committee (DNC) also announced that the Arizona debate to be held on March 15 would not have a live audience because of health concerns.