The proposed land swap would allow easy access to the crown jewel of the national park system. Democrats and former Park Service officials are incensed.

© Mike Kai Chen for The New York Times

Americans continue to flock to the national parks, with more than 320 million visitors in the last year alone. But that broad appeal is facing new political pressures, from orders to revise exhibits to President Trump's construction projects. Amna Nawaz discussed the state of national parks with Tiernan Sittenfeld, the president and CEO of the National Parks Conservation Association.

A new National Park Service report backs President Donald Trump's proposed arch, despite what it says are adverse effects to the sightline between a host of iconic landmarks in Washington, including the Washington Monument and Lincoln and Jefferson memorials.