It creates an incentive (for teachers) to move away from the most challenging schools, the most challenging kids. And it sends a signal to people looking at the profession that this is a profession where excellence is not rewarded.

It's potentially very significant because it's no secret that there's a split in organized labor. The NEA, which has potentially millions of members, is essentially choosing a side.

That's one of the concerns you hear, that she is more interested in making peace among the special interests than in enforcing the law.