Standing in the storied Canterbury Pulpit above the president on Tuesday, Bishop Mariann E. Budde was a little afraid.

The leader of the Episcopal Diocese of Washington, she had planned for months to preach on three elements of unity — dignity, honesty and humility. But just 24 hours earlier, she had watched President Trump proclaim his agenda from the inauguration stage, as conservative Christians anointed him with prayer.

He was no longer just campaigning — he was governing, she thought. His nascent presidency and flurry of executive orders had so far encountered little resistance. She felt called to add a fourth element to her sermon: A plea for mercy, on behalf of everyone who is scared by the ways he has threatened to wield his power.

“I had a feeling that there were people watching what was happening and wondering, Was anyone going to say anything?” she explained quietly in an interview on Tuesday night. “Was anyone going to say anything about the turn the country’s taking?”

So, she took a breath, and spoke.

President Trump, seated seven feet below and some 40 feet to her right, made eye contact. One representation of American Christianity began speaking to another, and the most powerful man in the world was arrested by the words of a silver-haired female bishop in the pulpit. Until he turned away.