On 21 Jan 2017, the White House called a press conference where the press secretary accused the media of "deliberately false reporting" on two issues of which the number of people attending President Trump's inauguration was one. The inauguration took place in Washington DC. The number of people using the Washington DC transit system on the day of the inauguration was one of the pieces of evidence which the press secretary used to support his assertion that the inauguration had had a greater attendance than the previous inauguration and that the media was deliberately misleading the public by reporting otherwise.
White House press secretary Sean Spicer said the following:
We know that 420,000 people used the D.C. Metro public transit yesterday, which actually compares to 317,000 that used it for President Obama's last inaugural.
Source: "Sean Spicer held a press conference. He didn’t take questions. Or tell the whole truth", Chris Cillizza, Washington Post, 21 Jan 2017
Did more people use the DC Metro transit system on the day of Trump's inauguration than on the day of Obama's second inauguration (in 2013)?