ON THE TRAIL: Monday, March 31, 2008

Compiled by Jonathan Helman, CNN Washington Bureau

*Hillary Clinton hosts a roundtable discussion in Harrisburg, Pennsylvania and attends a rally in Fairless Hills, Pennsylvania.

*John McCain delivers a speech at the Mississippi State University and partakes in a community service event both in Meridian, Mississippi.

*Barack Obama attends a town hall meeting in Lancaster, Pennsylvania and a rally in Allentown, Pennsylvania.