President Obama and his White House staff are making mistakes that continue to worsen an already deflating U.S. economy. As the stock market plunged below the Dow's 7,000 mark -- a loss of 1,500 points since his inauguration -- Obama casually dismissed the sharp drop in equity values, comparing it to the ups and downs of a poll. The stock market "is sort of like a tracking poll in politics," he told news reporters. "You know, it bobs up and down day to day. And if you spend all your time worrying about that, then you're probably going to get...