Trump’s plan to reopen America can’t work without a massive surge in testing

The number of new coronavirus tests reported each day has plateaued — a big blow to the prospects of America reopening its economy safely anytime soon, even as President Donald Trump insists the country is weeks away from doing so.

Trump announced guidelines on April 16 for states to reopen, calling for governors to ease social distancing measures, such as stay-at-home orders, as the number of new coronavirus cases begin to come down. He acknowledged a requirement for reopening the economy is that the federal government and states must know...