>
> $75,000+ -19
> $30-74,999 -10
> under $30,000 -22 (to 43%, a level lower than the $30-74,999 group!)
>
This is the most interesting one. Why are the higher and lower-income groups[1] reacting more strongly than the middle-income ones? Because they're more likely to be the beneficiaries or victims of unionization, and thus there's higher salience?
[1] I'm not going to get involved in this semantic debate.