Truth does not mean the same thing to you and me that it does to a politician. When you and I say we are telling the truth, that means what we are saying is in accord with reality.
Politicians find that definition unreasonably strict.
What is true and real one day may not be so the next. Enter Bill Clinton. Back at the beginning of 1992, Bill Clinton was running for president and fighting for his political life. Stories accusing him of draft dodging and fibbing about marijuana use had already surfaced in the press when the Gennifer Flowers story crashed onto the scene. Flowers claimed that she had a 12-year affair with Clinton while he was married and governor of Arkansas.