The country would face an economic hellscape if the government shutdown lasts "months or even years," as the president has suggested it might, experts tell NBC News. The doomsday scenario might be unlikely — the longest the federal government has ever shut down is 21 days, a record that will fall if the current closure lasts until Saturday — but it is chilling. "We'll be in no man's land," Mark Zandi, chief economist at Moody's Analytics, told NBC News. If the worst were to happen, experts say the devastating impact would be widespread: 38 million low-income Americans lose food stamps...