Thirteen former aides to past presidential administrations including seven White House press secretaries penned an open letter for CNN on Friday calling out the lack of press briefings by President Donald Trumps administration.

The letter comes as media watchdogs noted that 300 days have passed since the public was offered an official White House press briefing from the official White House press secretary the post now filled by Stephanie Grisham .

Along with the press secretaries who served under Presidents George W. Bush , Bill Clinton and Barack Obama, the letters other signees handled communications and public affairs for the State Department and the Pentagon.

All of us have experienced the challenges of a regular press briefing whether at the White House, the State Department or the Pentagon, the letter opens. We all had days where the last place we wanted to be was behind one of those podiums. But day after day, we persisted.