Democratic primaries can be a nasty business, with mudslinging sometimes emerging from the most unlikely of sources. Back in 1988, for instance, Democratic operatives (linked to Al Gore) were able to get the Miami Herald to investigate Gary Hart's "Monkey Business." Bill Clinton's personal problems -- starting with Gennifer Flowers -- began in late 1991, as Democratic primary opponents buzzed about information they said would open the future president up "like a soft-shelled peanut." It didn't work against Clinton, but that won't stop the Democrats this time again. Their target now: Democratic fundraiser front runner Senator John Kerry. The...