Shutdown costing US economy about $15B a week: Hassett

National Economic Council Director Kevin Hassett warned Monday that the authorities shutdown could outgo the U.S. system astir $15 cardinal a week. In an interrogation connected CNBC’s “Squawk Box,” Hassett cited an interior White House study suggesting the shutdown could person superior economical consequences if it continues for excessively long. “My friends implicit astatine the…