The CEO of Bridgewater Associates has stepped down from his post to mull launching a bid for a U.S. Senate seat, the company said Monday. David McCormick, 59, “has made the decision to leave Bridgewater in order to consider running for the open Senate seat in his home state of Pennsylvania,” the hedge fund said in a memorandum from its top remaining executives. McCormick was CEO for nearly five years and at Bridgewater for 12 total after spending time in the George W. Bush administration and the military. The Connecticut-based Bridgewater made deputy CEO Nir Bar Dea and co-chair of the operating board of directors Mark Bertolini co-CEOs to replace McCormick. “While we will miss him, we are also joyous for his opportunity to pursue his hero’s journey in service to our country, and we are especially grateful for the gifts he left us,” executives said in the memo. McCormick …