If you ever doubted that money outweighs principles in contemporary politics, then the case of Richmond campaign consultant Boyd Marcus should permanently erase such ambiguity in your mind. Marcus, a prominent figure in Virginia politics for two decades, made headlines in August when he abandoned a lifetime of supporting Republicans to endorse Democrat Terry McAuliffe for governor. McAuliffe’s team and Marcus trumpeted the conversion as an important political sign that mainstream Republicans were rejecting the tea party conservatism espoused by GOP candidate Ken Cuccinelli II. Instead, we learned Thursday, the primary motive was entirely mercenary. An e-mail was made public...