Which type of persuasive writing is in the form of an essay?

a public service announcement

a political speech

an editorial

Political discourse is a discourse in the from of an essay, that is, to the extent that it defines purposes:

The appeal to reason.

The appeal to emotion.

Try to be persuasive, to get the approach your are looking for, usually when it is directed to a large group of people.

As they are speeches, they are prepared to have grater emphasis on the required place.