Incoming Utah Senator and former GOP presidential nominee Mitt Romney slammed President Trump’s character on Tuesday, writing in a Washington Post op-ed that it fell short of what the country needed.

“With the nation so divided, resentful and angry, presidential leadership in qualities of character is indispensable. And it is in this province where the incumbent’s shortfall has been most glaring,” Romney wrote.

Romney, who criticized Trump in the run up to the 2016 election, said the events of the past month, including the departures of Defense Secretary Jim Mattis and Chief of Staff John Kelly, marked a worrying decline for Trump’s presidency.

“On balance, his conduct over the past two years, particularly his actions this month, is evidence that the president has not risen to the mantle of the office,” Romney wrote.