I would highly recommend reading an excellent article The Autocrat’s Language.
Donald Trump… is particularly adept at taking words and phrases that deal with power relationships and turning them into their opposite.
Look at how Paul Ryan is playing the same trick with words. “Harm the president” means to kill or cause injury, or to threaten to do those things, which is illegal and damaging for the country. But the word “president” here is used instead of “autocrat’s power”, so it’s a completely different meaning. But the listeners are mislead because the expression implies a bad action. Pay attention to those tricks.
Here is what Confucius had to say on the topic:
If language is not correct, then what is said is not what is meant; if what is said is not what is meant, then what must be done remains undone; if this remains undone, morals and art will deteriorate; if justice goes astray, the people will stand about in helpless confusion. Hence there must be no arbitrariness in what is said. This matters above everything.