NSNBC's Chris Matthews, author of ''Tip and the Gipper: When Politics Worked''

A Washington insider, Matthews spent six years as a top aide and chief-of-staff to Former Speaker of the House Tip O'Neill. During that time he witnessed everything including the evolving relationship between two of the most powerful men running the country – O'Neil and President Ronald Reagan. Matthews says the pair, ''couldn't be more different or more the same'' and highlights the unlikely friendship between Reagan and O'Neill that endured philosophical differences and bipartisan politics.