To put the point in mildest terms, Ellen Weintraub and Don McGahn do not get along. When they served together on the Federal Election Commission, their mutual hostility was well enough known, and their time apart since Mr. McGahn left the agency does not appear to have eased the tension – – certainly not on Commissioner Weintraub's side, and probably not on Mr. McGahn's. Now Ms. Weintraub has published an op-ed in The Washington Post, arguing on the basis of her experience with Don McGahn that he is not fit to be the next White House Counsel.

How McGahn will perform in his current job might be judged as Commissioner Weintraub suggests, by putting the weight she does on a particular reading of his record at the FEC. Or, on a different view, a distinction could be drawn between Mr. McGahn's past and future roles, and a different standard of evaluation could be adopted for the work now ahead of him. In choosing the first of these alternatives, the Commissioner may be incorrectly framing the question of McGahn's suitability as White House Counsel and directing attention away from what is more relevant in assessing the role and performance of that Counsel in the incoming Administration.