Your President Says" poster
The pattern
This still is filed under Us-versus-them positioning.
Define
The buyer is invited into a side. The product is what we use. The named other is what we refuse.
Mechanism
Identity contrast. Choosing the offer is choosing a group. The out-group does as much work as the claim.
Verdict
The category is crowded
Why it works
It leverages the ultimate authority figure: the President: to deliver a direct, personal plea to the worker. The use of his portrait, signature, and a direct quote creates a sense of personal duty and national obligation.
Steal this when
You have a highly respected figurehead who can make a personal appeal to the audience to stick with a difficult task.