As Democratic and Republican leaders in Washington struggled to find agreement on spending cuts and extending the debt limit, Mitt Romney struck a conciliatory note in New Hampshire on Monday by lamenting partisan feuding while touting his record of working with Democrats — even the Senate’s onetime liberal lion Edward M. Kennedy. [...] At both stops, Romney pointed to the warmth between former President Reagan and former Democratic House Speaker Thomas P. “Tip” O’Neill as an example of what is needed in the Capitol. “I worked with [former Massachusetts Sen.] Ted Kennedy, for Pete’s sakes,” Romney said in Concord, noting...