As much as "Change We Can Believe In" and "Hope" lost their luster a bit since November 2008, the truth of the matter is things have changed. Some for the better, some for the worse. It is not necessarily a "left vs. right" change as those who lack the mental capacity to see the world in more than 2 dimensions and colors would like to tell us.
Just as with time moving forward relentlessly, change follows it along. Sometimes it sputters, and rolls back down the hill, crushing those who sought to move ahead and sometimes it rolls forward so suddenly that it splatters those who were trying to push it back. Time is completely unstoppable, it marches on and waits for no one. Change happens when the conditions are right and obstacles are removed, much like a trickle of water, it will eventually make it's way to the sea.
Time is the great equalizer and those old men who now sit around, calling for the death of the President because he's a "Socialist Communist Fascist Racist Muslim" when in fact, they cannot stand that he is a black liberal, they will soon enough be below the ground. As time moves forward, change comes along behind it. Their children will certainly inherit some of the hatred but as generations go forward, things that were unthinkable just a few decades ago will be accepted as commonplace. In the South just 50 years ago, segregation was the norm but now you will find few people born after that time that still ask for it to be the rule.
You cannot stop change in the grand scheme of things, you can only delay it.