In her new fund-raising letter for John Kerry sent via e-mail on Tuesday, Senate colleague Hillary Clinton denounces what she calls "mean-spirited" Republicans. "By contributing to this great cause, you can make sure that John Kerry's message of hope, promise, and opportunity isn't drowned out in a sea of Republican attacks," she urges. "We've already seen how mean-spirited a race the Republicans plan to run this year. George W. Bush has even gone negative in his television ads. Should they be allowed to get away with this kind of campaigning? "No! John Kerry is going to fight back every step...