In advance of next week's special elections in Mississippi, candidates Greg Davis and Travis Childers joined Politics Nation Radio, live every Saturday morning on XM Radio's POTUS '08.

Prentiss County Chancery Clerk Travis Childers, the Democratic candidate, is performing well, coming just 400 votes away from avoiding the runoff. But recent attempts to link Childers to Barack Obama and Nancy Pelosi may be reaping results. How does he get around being associated with national Democrats?

Southaven Mayor Greg Davis, the Republican candidate, came in three points behind Childers in the April 22 first round. Some national Republicans complain that he's from the wrong part of the district, but he retains a strong chance at winning on Tuesday, especially after Vice President Dick Cheney shows up for him on Monday:

Check out more coverage of Tuesday's special election in Mississippi here.