At Tuesday's briefing, Dr. Deborah Birx, the White House's coronavirus response coordinator, is expected to offer details of modeling that helped convince President Trump to extend his social distance guidelines. Michael Reynolds/EPA/Bloomberg via Getty Images…

People wait outside a supermarket, complying with citywide social distancing restrictions in New York City earlier this month. Bebeto Matthews/AP hide caption toggle caption Bebeto Matthews/AP People wait outside a supermarket, complying with citywide social…