Weekly Wrap: Mike Bloomberg's Campaign : It's Been a Minute with Sam Sanders Billionaire Michael Bloomberg has been rising in the polls. He's spent more than $450 million on ads, but faced a big challenge Wednesday in his first presidential debate. This week, Sam talks to two journalists who have covered Bloomberg for years. Rosie Gray, a reporter for Buzzfeed News, says that his lackluster debate performance shows that there is a limit to the power of money on the campaign trail. Matt Flegenheimer, a national political reporter for The New York Times, details how Bloomberg is using his wealth to run a very different campaign than his competitors. Then, Sam revisits his reporting from Oakland last year on the realities of young people living with gun violence every day.