Check out the audio from this week's Politics Nation on XM Radio, broadcast live on Saturday mornings from 10 a.m. Eastern to noon, and repeated again from 6 p.m. to 8 p.m. Eastern.

In the first hour, listen to Reps. David Price, of North Carolina, and Jason Altmire, of Pennsylvania, discuss where the votes will come from as Hillary Clinton and Barack Obama fight it out for delegate supremacy. Veteran pollster Fred Yang, an expert on all things Indiana, joins us as well:

In the second hour, Rolling Stone associate editor Ben Wallace Wells joins us to talk about his mammoth look at the National Republican Congressional Committee, a piece that appeared in this week's New York Times Magazine. Later, we're joined by David Drucker, of Roll Call, to chat about the battleground state that is New Mexico. All that and our Final Four picks in the second half:

Join us every week for Politics Nation Radio, Saturdays from 10 to noon and again from 6 to 8 p.m. Eastern. Don't have an XM subscription? Just log on to PoliticsNation.com on Saturdays to find the link to the free feed!