I wrote earlier that teacher unions are breaking with tradition by not endorsing the Democratic candidates in the Georgia governor’s race and North Carolina Senate race. Now I am told that the same thing happened in the Alabama governor’s race, where Democrat Don Siegelman won election in 1998 promising to boost education funding with lottery revenues. The following year, an anti-lottery coalition formed and killed a referendum authorizing it. Now Siegelman is on the defensive, locked in a dead-heat race with U.S. Rep. Bob Riley — and without the strong support of a key element of the Democratic base as the teacher union has not issued an endorsement.