If you are not sure how to start on the first assignment, here are a few links that should help search for arguments that may or may not be fallacious:
1--The McCain website has a nice "bad stuff about Joe Biden" page.
2--The Obama website has a page confronting McCain's accusations.
3--The Republican National Committee's research briefings site digs the dirt on Obama.
4--The Democratic National Committee's press release page has loads of negativity on McCain.
You might also like to check out the following site: FactCheck.org to get their assessment of the truth or falsity behind recent adds.
There's more out there, but this gives you a head start on the assignment.
