(Want to get this briefing by email? Here’s the sign-up.)

Good morning.

Here’s what you need to know:

Who wrote the Op-Ed?

• It’s the question almost everyone in Washington (and beyond) wants answered.

President Trump erupted in anger on Wednesday after The Times published a stinging Opinion piece by an unidentified senior official saying that a “quiet resistance” in the administration was working to thwart the president’s “worst inclinations.” The article, which said the president’s problems were rooted in “amorality,” raised questions about his capacity to govern. Read the Op-Ed here.

Mr. Trump denounced the essay, calling it “gutless,” and the White House press secretary, Sarah Huckabee Sanders, issued a statement about its author saying, “This coward should do the right thing and resign.”

Washington has been scrambling to identify the anonymous official. This morning, Vice President Mike Pence and Secretary of State Mike Pompeo denied writing the piece.