To boost their morale and their poor prospects this fall, congressional Republicans had a little ceremony at the Capitol to roll out a new slogan for the party: “The Change You Deserve.” Not only was the slogan uncomfortably close to Barack Obama’s “Change You Can Believe In,” it was also the trademarked ad slogan for Effexor, a prescription antidepressant whose side effects — nausea, irritability, etc. — the Democrats gleefully recited. It’s been that kind of year, actually two years, for the Republicans. ...