President Obama’s top economic adviser, Austan Goolsbee, has decided to resign less than a year after he became chair of the Council of Economic Advisers. The announcement comes just days after the government revealed the nation’s official unemployment rate has jumped back up to 9.1 percent. The nation is facing its worst unemployment slump since the 1930s. CBS News reports about 6.2 million Americans—45 percent of all unemployed workers in the country—have been jobless for more than six months, a higher percentage than during the Great Depression.