What makes a lie? How big does it have to be? I don’t know of any system to measure lies? That’s one reason science doesn’t talk about truth and lie except in simplifying thing for bogs.
It seems to me that lies have to be considered absolute. There is no situation, no value of N such that if you make a promise to N people and the promise is false it’s not a lie but for N+1 people it is.
Similarly, if you make a promise to N people and the promise is false to one (1) person, then the promise is a lie.
So let’s get past the political rhetoric. The chief politician lied. All politicians lie. All humans lie. What is sad is that too many of us fell for the lie.