It is an homage to a 1994 "Contract with America" offered by the Republican Party's campaign for Congress. At that time they had been out of power for 40 years. They knew voters didn't like them, so instead of saying "Like us!", they said, "here, in writing, is what we'll do if you give us your vote". It was a good idea, and they won a major election which permanently changed the balance of power.

Trump similarly faced an electorate that didn't like him or his opponent. She said "Like me!" and he said "Here's what I'll do for you." It was a smart thing to do. A much lower hurdle to have to jump.