Rather than a sweeping national campaign of screening, drive-through sample collection and lab testing, NPR found a smattering of small pilot projects and aborted efforts.

Also, the White House is working to reduce wage rates for foreign guest workers on American farms. Opponents of the plan argue it will hurt vulnerable workers and depress domestic wages.

This episode: campaign correspondent Asma Khalid, White House correspondent Franco Ordoñez, national political correspondent Mara Liasson, and investigations correspondent Tim Mak.