In Filthy Rich Politicians, conservative columnist Matt Lewis presents some startling figures. Senator Rick Scott: net worth of approximately $200 million. Representative Michael McCaul: $125 million. Nancy Pelosi: $46 million. In his book, Lewis takes a close look at how people get richer after they're elected to office, and what this wealth means for our political systems. He speaks with NPR's Steve Inskeep about how politicians amass money not just for themselves, but their families – and how Donald Trump is a prime example of that.