
The Dollop is a weekly podcast hosted by Dave Anthony and Gareth Reynolds. Each week one topic from American history is discussed at length.
Website: http://thedollop.libsyn.com/
Sources for each episode are posted on their site if you go to the page of the episode.
I originally made a thread for an individual episode here:
The story of the wife-swapping Yankees pitchers as told by comedians
It was interesting and hysterical. So I listened to some more episodes and it's a really good podcast and they source their facts.
I recently listened to their Iraq War episode and it is pretty amazing.
I was turned onto it by this Patton Oswalt tweet:

And I wasn't disappointed.
Subscribe to the podcast with whatever app you use, or go to the website.
The Iraq War episode: http://thedollop.libsyn.com/122-the-iraq-war
Direct mp3 episode link: http://traffic.libsyn.com/thedollop/Iraq_War.mp3
It is 1 hour and 25 minutes long, and 58MB in size. (Episode starts 3m 14s)
If anyone decides to listen/subscribe we can talk about any episode here. The latest puritans and quakers episode is pretty good.