POLITICAL MEMO Jeanne Shaheen, the former governor of New Hampshire and Kerry-Edwards campaign chairwoman, is the keynote speaker. Faye Wattleton and Robin Chandler Duke, among the best-known women's rights advocates in the country, are chairwomen. And C. Virginia Fields, the Manhattan borough president who is hoping to become the city's first female mayor, is the beneficiary. They will all come together on Thursday at a "Women for Fields Kickoff Mayoral Breakfast" at a Midtown hotel, a fund-raiser for her campaign that is expected to be Ms. Fields's largest so far and one that sends the unmistakable message that she believes...