host: joe allbaugh, thanks for joining us this morning. guest: you bet, bill. host: up next, our "by the numbers" segment, with the demographics of undecided voters in the u.s. our guest will be frank newport. that is all ahead as "washington journal" continues. >> during the republican and democratic conventions, we are asking middle and high school students to send a message to the president as part of the studentcam video documentary competition. students will answer the question, what is the most important issue the president should consider in 2013? for a chance to win the grand prize of $5,000, and there is $50,000 in total prize is available. c-span's studentcam video competition is open to students grades 6 through 12. for complete details and rules, go online to studentcam.org. >> c-span's gavel-to-gavel coverage of the democratic convention starts next week. every minute, every speech, live on c-span, c-span radio, an online at c-span.org. featured speakers tuesday and include it the mayor of san antonio and first lady michelle obama. wednesday, massa