"Whenever a fellow tells me he's bipartisan, I know he's going to vote against me"

Harry S. Truman's quote suggests that he does not trust people who claim to be bipartisan. He believes that if somebody claims to be bipartisan, they are likely to vote versus him. This could be since Truman was a Democrat and he believes that people who claim to be bipartisan are really Republicans in disguise. It might also be because Truman was a strong believer in the power of the Democratic Party and he thinks that people who declare to be bipartisan are actually attempting to weaken the Democratic Party. Truman's quote is a reminder that individuals must be wary of those who claim to be bipartisan, as they may not have the very best intents.