Question abput Paul Ryan's use of the word "litigate"

[Exapno_Mapcase]

cant

the phraseology peculiar to a particular class, party, profession, etc.:
the cant of the fashion industry.

argot

the special vocabulary and idiom of a particular profession or social group:
sociologists’ argot.

jargon

the language, especially the vocabulary, peculiar to a particular trade, profession, or group:

It really doesn’t matter whether you would use the term in this way or whether you approve the term used in this way if it is a normal part of the cant or argot or jargon of politicians. Specialized vocabularies often are confusing to outsiders. That does not invalidate them in any way.