Perhaps some climate-change sparks will fly: Sarah Palin and Arnold Schwarzenegger will both be in Columbus, Ohio Friday.

Palin is in town to keynote an Ohio Right to Life rally at the Aladdin Shrine Center Friday evening; Schwarzenegger is in town Friday through Sunday (he had already left California, as of mid-afternoon Friday) for his Arnold Sports Festival and expo, being held in Columbus. The expo is being held about eight miles from Palin's rally at the Columbus Convention Center.

Schwarzenegger, one of the greener members within the GOP's ranks, had a back-and-forth with Palin in late 2009 over the validity of global warming.

With both in the public eye in Columbus, now might be a good time for them to renew the climate rivalry.