The chairman of the Federal Communications Commission has opened an investigation into NPR and PBS over the public broadcasters’ airing of commercials. Brendan Carr, President Donald Trump’s pick to lead the agency,

The investigation will revolve around NPR and PBC airing sponsorships across their 1,500-plus member stations, FCC Chairman Brendan Carr said.

Brendan Carr, the Trump-allied chairman of the Federal Communications Commission, sent a letter this week to the heads of NPR and PBS announcing an investigation into the public outlets for airing sponsorships,