Former CBO director: None of the Democratic candidates have good tax plans

Mike Bloomberg will take the stage on Wednesday night in his first Democratic presidential debate. The spotlight will be on his $5 trillion tax plan and how his message has changed over the years. Douglas Holtz-Eakin, American Action Forum president and former CBO director, and Jason Furman, professor at Harvard's Kennedy School and former CEA chairman, join "Squawk Box" to discuss.