(CNN) - Yes, the debate between Joe Biden and Paul Ryan is sure to be entertaining, and it comes at an important moment in a highly competitive presidential campaign. But let's not get carried away.
Some healthy context, courtesy of Republican pollster Whit Ayres: "Dan Quayle got his clock cleaned in his VP debate and still ended up as vice president."
Tune to CNN for Thursday's vice presidential debate coverage starting at 7 p.m. ET on CNN TV, CNN.com and via CNN's apps for iPhone, iPad and Android. Web users can become video editors with a new clip-and-share feature that allows them to share favorite debate moments on Facebook and Twitter.FULL STORY