Hang on sec. I love ragging on Collins as much as the next sane person, but 1) we don't know whether she agrees with the $12.15 per hour set by her state's government, and 2) even then, when setting nationwide policy, she has to consider what she thinks the optimal minimum wage is in Alabama, Kansas, etc, not just Maine.
It is not at all inconsistent to think that people in one state should be paid X and in another state should be paid Y. I agree that NYC, for example, should have its own minimum wage that is higher than the national average.