Watch CNBC's full interview with Wharton’s Jeremy Siegel

Jeremy Siegel, professor of finance at the University of Pennsylvania's Wharton School of Business, joins 'Squawk Box' to discuss the possibility of a U.S. recession, the labor market, inflation and more. "I think we're actually in a mild recession because I think we're having negative GDP growth in this first half," Siegel told CNBC.