For the second time in a week, President Trump on Sunday excoriated the former F.B.I. director James B. Comey in a series of tweets after details from Mr. Comey’s tell-all book were leaked before its official release.

In the latest tirade, which unfolded over an hour, the president declared that Mr. Comey “will go down as the WORST FBI Director in history, by far!” He mentioned Mr. Comey’s contemporaneous notes of their meetings, calling those memos self-serving and “fake.”