David Cameron is seeking to seal the deal with British voters by deploying a version of Gingrich's 1994 Congressional campaign:

Titled “A contract between the Conservative Party and you” It is accompanied by a personal pledge from Mr Cameron, who tells voters that the contract "couldn't be clearer".

"If we don't do the things it sets out, if we don't deliver our side of the bargain: vote us out in five years' time," adds the Tory leader, who is shown in a photograph signing a piece of paper.

Cameron is proving a strong closer. I'm more confident of a clear Tory victory now.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.