In English, there is a common saying “Methinks thou dost protest too much.” It is spoken in mock old English because it is a modification of a Shakespeare quote from Hamlet, “The lady doth protest too much, methinks.” The modification makes it applicable to both genders.
There is a similar saying in Chinese that is common after listening to politicians claim that some particular relationship doesn’t really matter, they weren’t involved. It is:
[(ㄇㄟˊ)(ㄍㄨㄢ ㄒㄧˋ)](ㄐㄧㄡˋ)(ㄕˋ)(ㄧㄡˇ)(ㄍㄨㄢ ㄒㄧˋ)
[(méi)(guān xì)](jiù)(shì)(yǒu)(guān xì)
[(not)(to concern) = doesn’t matter](just)(to be)(there is)(to concern, to have to do with)
If they say so much it doesn’t matter, there probably really is something to be concerned about.
In other words, if the politician tries to make a point that something doesn’t matter, it probably does. They are probably trying to hide something.