Imagine the president says, "Everything in the war is going as planned. Trust me, I am the president." Given that she is seeking to persuade the audience by an appeal to the source rather than the content of her message, she is using what form of the elaboration likelihood model?

The president is using a periferial route form of elaboration.

Explanation:

The Elaboration likelihood theory engaes two aspects by wich a speaker can convince the audience he or she is refering to. This two ways are called routes and they are: ther periferial or the central route. In this case the president is using the perferial route.

It is defined as a way to persuade people without having to give sustained arguments to show what he or she is saying is so. She uses his position as a president to generate credibility among the audience and convince them that her merits or position are reason enough for credibility, so she won't have to give logical arguments.