Communicating one's beliefs: Republicans are "pandering to their base"; Democrats are "articulating their vision."
Sticking to one's beliefs: Republicans are "inflexible"; Democrats are "principled."
Changing one's mind: Republicans "flip-flop"; Democrats "evolve" and "adopt a more nuanced position."
Scandals: Republicans "must resign (for the good of their party)"; Democrats "engage in private behavior" that "doesn't affect job performance."
I have a small issue with the third one, though. To quote John Maynard Keynes, “When the facts change, I change my mind. What do you do, sir?” Though it seems to me that too many Democrats are the ones unwilling to change their minds when exposed to the facts of one situation or another. Is that really what it means to “adopt a more nuanced position”?
The double standard becomes quite apparent when looking at these few examples. There are plenty more to be seen in Chadwick's op-ed piece and well worth reading.