Tim Pawlenty quit as co-chair of Mitt Romney's presidential campaign on Thursday to become one of Wall Street's top lobbyists in Washington. Pawlenty, a former governor of Minnesota, will lead the Financial Services Roundtable. The move came with Romney's campaign struggling to find its stride with just seven weeks left before Election Day. Polls show the former Massachusetts governor running neck and neck with President Barack Obama in a contest both sides predict will be very close