Hearing Donald Trump and all his lackeys repeating “no quid pro quo” ad nauseam gave me flashbacks to an earlier Republican president:
This was sufficiently prominent to be parodied in Doonesbury:
Rick: Sir, off the record, what’s the deal with Honduras? It really is starting to look like you cut a deal with President Suavo to support the Contras…
Bush: Rick, that’s just a bunch of needless, reckless speculation, so let me help you out, fella…The word of the President of the United States, me, George Bush, is there was no pro quo! Repeat, no… quid…pro…quo! Ergo, no de facto or de jure nolo contendere! Reporters: Quis? Quois?
Common Infirmities 
From the right…. lies, damned lies.