Can noncitizens protest? Should you leave your phone at home when flying into and out of the United States? Post reporters walk us through the gray areas being used by the Trump administration in its effort to crack down on immigration.

Trump’s plan to take over Greenland

Post Reports is the daily podcast from The Washington Post. Unparalleled reporting. Expert insight. Clear analysis. Everything you’ve come to expect from the newsroom of The Post, for your ears. Martine Powers and Elahe Izadi are your hosts, asking the questions you didn’t know you wanted answered. Published weekdays around 5 p.m. Eastern time.