Jack Lew, Obama's current chief of staff and his reported choice to replace Timothy Geithner as Treasury Secretary, is known for a lot of things – the New York Times says he's a "fiscal progressive" with "fiscal expertise" and a "low-key style," whatever any of that means – but that's not what we're here to discuss; instead let's talk about his signature, which will soon grace all new dollar bills.

Here's a brief history of President Obama's White House chiefs of staff: Rahm Emanuel, a former Clinton official who then worked in investment banking, was replaced in 2010 by Bill Daley, a former Clinton official who then worked in investment banking, in order to run for Mayor of Chicago, a seat that had been held for 20 years by Bill Daley's brother.