Gov. Rod Blagojevich and his chief of staff John Harris were arrested today by FBI agents on federal corruption charges. Blagojevich and Harris were accused of a wide-ranging criminal conspiracy that included Blagojevich conspiring to sell or trade the Senate seat left vacant by President-elect Barack Obama in exchange for financial benefits for the governor and his wife. The governor was also accused of obtaining campaign contributions in exchange for other official actions. Blagojevich was taken into federal custody at his North Side home this morning. A Blagojevich spokesman said he was unaware of the development. “Haven’t heard anything — you are first to call,” Lucio Guerrero said in an e-mail. The stunning, early morning visit by authorities to the governor’s North Side home came amid revelations that federal investigators had recorded the governor with the cooperation of a longtime confidant and had begun to focus on the possibility that the process of choosing a Senate successor to President-elect Barack Obama could be tainted by pay-to-play politics.