"Yes we can" is one of the most iconic campaign slogans in recent memory. David Axelrod is the man who wrote the tagline for then-Illinois State Senator Barack Obama who was running for U.S. Senate. Axelrod, who's known President Obama since 1992, spent two years as a senior adviser to the president in the White House. Axelrod joins "CBS This Morning" to discuss his new book, "Believer: My Forty Years in Politics."