Trump then had press secretary Sean Spicer call an impromptu briefing in which Spicer lashed the press for estimating crowd size. “Nobody had numbers, because the National Park Service does not put any out,” he insisted. Seconds later, he said: “This was the largest audience ever to witness an inauguration, both in person and around the globe.”
This, along with much else Spicer said, was plainly untrue. But there’s a strategy at work here. The Trump administration is creating a baseline expectation among its loyalists that they can’t trust anything said by the media. The spat over crowd size is a low-stakes, semi-comic dispute, but the groundwork is being laid for much more consequential debates over what is, and isn’t, true.
Delegitimizing the institutions that might report inconvenient or damaging facts about the president is strategic for an administration that has made a slew of impossible promises and takes office amid a cloud of ethics concerns and potential scandals.
http://www.vox.com/policy-and-politics/2017/1/21/14347952/trump-spicer-press-conference-crowd-size-inauguration