 This is Fresh Air. I'm Tanya Mosley. And joining us today is David Madlen, a senior fellow and advisor to the American Worker Project at the Center for American Progress, which is an independent nonpartisan policy institute. We're discussing the resurgence of manufacturing jobs under the Biden administration and the grassroots efforts to unionize workers. Madlen is the author of two books, which include Hollowed Out, Why the Economy Doesn't Work for a Strong Middle Class,