Several Democratic aides say that some in the caucus are quietly expressing reservations that Pelosi’s announcement came before the transcript of the July 25 phone call between Trump and Ukraine’s President was released and before Congress received the whistleblower’s complaint.

Many of the moderate members who have come out in support for impeachment have made their support conditional: If it is true Trump withheld military funding to Ukraine in order to elicit dirt on a political opponent, then it is impeachable.

But, Pelosi’s announcement yesterday caught some by surprise even as members were racing to come out in support of impeachment. A senior Democratic aide with insight into moderate Democratic thinking told CNN that many members preferred for Pelosi to wait until the end of the week when the contents of the complaint and transcript were fully known.