U.S. Attorney Joseph Hogsett is resigning at the end of this month. Hogsett, who's been United States Attorney for the Southern District of Indiana since October 2010, announced his decision in a letter Monday to U.S. Attorney General Eric Holder, but didn't give a reason as to why he's leaving the post. Hogsett had earlier said he planned to finish out his term as U.S. Attorney. There's been speculation that Hogsett, a Democrat, is considering a run for mayor of Indianapolis next year. Meanwhile, Evan Bayh, former U.S. Senator and two-term Indiana Governor, spoke to reporters Monday and talked up Hogsett's qualifications for the mayor's office. While Bayh was Governor, Hogsett served as Indiana's Secretary of State from 1989 to 1994. The Times reports that on the topic of his own political future, Bayh would not rule out the possibility of running for Governor again.