Painter in the NYT opinion section:

But it would be highly improper, and an abuse of power, for the F.B.I. to conduct such an investigation in the public eye, particularly on the eve of the election. It would be an abuse of power for the director of the F.B.I., absent compelling circumstances, to notify members of Congress from the party opposing the candidate that the candidate or his associates were under investigation. It would be an abuse of power if F.B.I. agents went so far as to obtain a search warrant and raid the candidate’s office tower, hauling out boxes of documents and computers in front of television cameras.

The F.B.I.’s job is to investigate, not to influence the outcome of an election.

Such acts could also be prohibited under the Hatch Act, which bars the use of an official position to influence an election. That is why the F.B.I. presumably would keep those aspects of an investigation confidential until after the election.

And that is why, on Saturday, I filed a complaint against the F.B.I. with the Office of Special Counsel, which investigates Hatch Act violations, and with the Office of Government Ethics. I have spent much of my career working on government ethics and lawyers’ ethics, including two and a half years as the chief White House ethics lawyer for President George W. Bush, and I never thought that the F.B.I. could be dragged into a political circus surrounding one of its investigations. Until this week.