U.S. to Suspend Most Travel From Europe as World Scrambles to Fight Pandemic

Testifying on Capitol Hill, Mr. Mnuchin noted that all individuals were allowed to request tax filing extensions online, but that this would be a special provision to help small and midsize businesses and “hardworking individuals” afflicted by the coronavirus. The delay would not apply to large corporations or the wealthiest Americans, he said, without elaborating.

It fell to Dr. Fauci and other health officials to sound the alarm that Mr. Trump seemed unwilling to voice himself. “We must be much more serious as a country about what we might expect,” Dr. Fauci told the House Oversight and Reform Committee. “We cannot look at it and say, ‘Well, there are only a couple of cases here, that’s good.’ Because a couple of cases today are going to be many, many cases tomorrow.”

Dr. Robert R. Redfield, the director of the Centers for Disease Control and Prevention, said that “this is the time for everyone to get engaged.”

The hearing quickly devolved into a partisan fight over the Trump administration’s handling of the outbreak. Democrats assailed the president for a slow response and misleading statements, while Republicans said Mr. Trump’s critics were trying to score political points.

“The 24/7 criticism the president is undergoing is unwarranted at a minimum,” said Representative Mark Green, Republican of Tennessee.

Representative Gerald E. Connolly, Democrat of Virginia, displayed a picture of the president wearing a campaign hat while visiting the C.D.C. “We will not be lectured about politicization,” he said, “and all of your words and sanctimony will not cover up the fact that this administration was not prepared for this crisis and put lives, American lives, at risk.”

Reporting was contributed by Elisabetta Povoledo, Steven Erlanger, Alissa J. Rubin, Annie Karni, Marc Santora, Megan Specia, Vindu Goel, Elian Peltier, Jason Horowitz, Emma Bubola, Nicholas Bogel-Burroughs, Jorge Arangure, Matthew Futterman, Elaine Yu, Amy Qin, Alan Rappeport, Emily Cochrane, Noah Weiland, Sheri Fink, Mike Baker, Monika Pronczuk, Melissa Eddy, Roni Caryn Rabin, Donald G. McNeil Jr., Andrew Keh, and Katie Thomas.