AZBlueMeanie (Blog for Arizona) explains why Reagan has no legal basis for her intervention in the Republican lawsuit against the IRC maps. For example, there is a world of difference between "equal" and "substantially equal." And this:
Prop. 106 says "Both legislative and congressional districts shall be equal in population, to the extent practicable."
Not absolutely equal. But absolute equality is the contention of the lawyer representing Republicans. You think they could find a better case. Uh ... maybe not.