If there is one hard and fast rule about this year's primary, it's this: there are no hard and fast rules. In fact, as the 2012 Republican primary progresses, it increasingly resembles the 2008 Democrat primary.
Some pundits are claiming Herman Cain's infant political career is over. But it's not because of his lack of experience or even his singing at a press conference. Instead because years-ago he may have said some politically incorrect things to women, which today count as sexual harassment.