Answer:
This is argumental.
Explanation:
•He compares america with places with bigger, and better infrastructure and although motivating the people he is also pushing them into taking action. "our infrastructure used to be the best, but out lead has slipped" THIS. Barack Obama is ready to bring the Americans into action, and although some words my be motivating, the tone pushes more to change then sweet talking.
sorry if this doesn't make sense, hope it helps
* also (another thing that proves its aurgumental) is that persuasive in this case is trying to get the reader to agree with you, and aurgumental is just stating idea with fact. Barack Obama isn't trying to make anyone want to change how America is, he is simply just stating his idea for America and the facts that prove his idea right.