As we've been made painfully aware this campaign, Hillary Clinton is no Bill Clinton. But what should worry Hillary is that Ted Cruz just might be. In last week's debate, Marco Rubio lit into Cruz with a lengthy harangue of supposed flip-flops on immigration, trade, ethanol and other issues. Rubio charged Cruz was no "consistent conservative." In short, Rubio was calling Cruz out as being politically "slick." If so, he shares certain attributes with successful two-term presidents -- the ability to engage seemingly contradictory elements of the party base and ideological, ahem, "fluidity" that drives other members of the party...