This Sunday, George goes "On the Trail" with Sen. Joe Biden in Iowa. With more than three decades in the Senate, Biden is one of the most experienced candidates in the race, but his campaign is struggling to gain traction. Biden, D-Del., sits down with George to discuss his career, his campaign strategy, and his leadership of the Senate Foreign Relations Committee. Watch to find out where he stands on Iraq, Iran and health care. Then on our "Roundtable," Laura Ingraham, Mark Halperin, Donna Brazile and George Will debate the week's politics. And our "Voice," baseball great Tommy Lasorda. The Hall of Fame Dodger's new book, "I Live for This!: Baseball's Last True Believer," reflects on Lasorda's long career and love of the game. A true "American dream" story, Lasorda went from being a scrawny kid with average skills to one of the most successful managers in baseball history.