Several years ago, I saw Grover Norquist, head of Americans for Tax Reform, tell an audience of conferencing Republicans that branding is important. If you're Coca-Cola, Norquist explained, your business will suffer if a customer ever finds a rat in a bottle of your soda. Similarly, the GOP will suffer if anything undermines its reputation as the party that lowers taxes. A Republican who ever supports a tax increase must be subject to "quality control", for such a creature is… more