"Another part of the explanation is easier to discern. The reddest states on that map at the top—Mississippi, Alabama, Louisiana, New Mexico, Maine—have exceptionally high poverty rates and thus receive disproportionately large shares of federal dollars. Through a variety of social programs, the federal government disburses hundreds of billions of dollars each year to maintain a “safety net” intended to help the neediest among us. Consider, for example, the percentage of each state’s residents who get “food stamps” through the federal government’s SNAP program. This chart tells the story." ...
"As it turns out, it is red states that are overwhelmingly the Welfare Queen States. Yes, that's right. Red States—the ones governed by folks who think government is too big and spending needs to be cut—are a net drain on the economy, taking in more federal spending than they pay out in federal taxes. They talk a good game, but stick Blue States with the bill."  
www.The Atlantic.com