The day after his inauguration, President Trump placed a call to the acting head of the National Park Service, Michael Reynolds.
"I can confirm that the call took place. I can't comment on the content of the conversation," National Park Service spokesman Tom Crosson said in an email to NPR.
Trump reportedly was upset over the agency's retweeting of side-by-side photos that unfavorably compared the crowd sizes at his and former President Obama's inaugurations. The retweet was later removed.