When the first woman president moves into the White House, she will not only be indebted to the tireless campaign workers, staff, press, family, friends, and, of course, the voters who got her there, but Madam President will also have her sisters to thank for paving the way. Among these women are Margaret Chase Smith, the stalwart Republican senator from Maine who made a bid for the presidency in 1964; Shirley Chisholm, the fiery New York congresswoman...