New Jersey governor Chris Christie is starting to resemble Sarah Palin. No, not physically! Definitely not physically. Demographically. Since his election last year, Christie has unexpectedly emerged as a conservative folk hero and dark horse presidential candidate. He likes putting people in their place and uploading video of these encounters to YouTube. But as Ezra Klein pointed out yesterday, this sort of bullying behavior doesn't wear well over time. And sure enough, two new polls out today show that Christie's overall approval rating is slipping. But what's really happening, if you look closely at the numbers, is that Christie is becoming more polarizing. Like Palin, people either love him or they hate him. Also like Palin, many of his supporters doubt that he'd make a good president. Only 50 percent of New Jersey Republicans say he belongs in the White House.