The Federal Communications Commission chair, Brendan Carr, admitted at a Senate hearing on Wednesday that there had been a political sea change and he no longer viewed the FCC as an independent agency. Commissioners, he says, serve at the pleasure of the president. In his case, that president is Donald Trump, whose face Carr wears as a lapel pin, whose agenda he loudly embraces, and who often publicly demands that Carr censor his critics, including revoking their broadcast licenses.