I think this one has legs. CNN actually did a fair job of reporting on Mueller's editing of Dowd's phone call in an attempt to allege obstruction. One thing that is missing in most of the reports is that the conversation was between Trump's attorney (not Trump) and Flynn's attorney. Yet, Mueller includes it among his ten or 11 items in his obstruction section.
https://www.powerlineblog.com/archives/2019/06/mueller-dings-dowd.php