It probably would take Collins and Snowe a lot of courage to vote against any anti-abortion measure, because probably every one they know is pro-choice. I think they are just both anti life pro abortion. olympia is known around here as the queen of infanticide.
Neither snowe nor collins is pro-choice, they are pro-abortion, plain and simple.
Collins and Snowe probably reflect the opinion of their social class. I would guess that 80% of the well-to-do people in the United States are pro-abortion, to a greater or lesser degree. It would be interesting to get a list of her Maine contributors and determined how they feel about the abortion issue.