Family members, particularly spouses, assuming a late politician's seat is not unusual in American politics. Among possible candidates to replace Rep. John Murtha, the Johnstown Democrat who died Monday, is his wife, Joyce. "While people have been mindful that this is a difficult time for the family, many have called to suggest Joyce as the perfect person to hold her husband's seat," Murtha spokesman Matthew Mazonkey said. Murtha represented Pennsylvania's 12th Congressional District. His term expires at the end of this year. Of the 260 women have who served in the U.S. House or Senate, 46 were widows who directly...