Leave the cheese in the trap....the rat will be back.

[Fla Dem]

13. I've read this story before and it's very appropriate. Also "A Leopard Never Changes Its Spots"

is also appropriate in describing Trumps true nature. Once a con, always a con, Whether it's in business or politics. Just because he became President doesn't change his true nature one iota.

The phrase “a leopard never changes its spots” means that it’s impossible for one to change their character, even if they will try very hard. The expression, sometimes also used as “a leopard can’t change its spots”, is used to explain the idea that no one can change their innate nature.

Interesting fact
This meaningful phrase dates as far back as the Old Testament. It was used in Jeremiah 13:23, where the Hebrew prophet Jeremiah had originally said: “Can the Ethiopian change his skin, or the leopard its spots?”. "A leopard never changes its spots" derives directly from that phrase and is still used today.

https://www.gingersoftware.com/content/phrases/a-leopard-cant-change-his-spots/#.XLnMEOhKjIU