To this day, I still do not understand why Collins decided to commit the biggest political suicide in recent history by voting for Kavanaugh. She could have fully and completely ensured herself a successful re-election by voting against Kavanaugh, but instead, she decided to fully and completely ensure herself a failed re-election.
...except Collins isn't going to lose re-election. Remember that a relatively high amount of Republicans still disapprove of her (the Morning Consult poll that has her at -3 approval has her at 61-34 approve-disapprove among Republicans), and I imagine the vast majority of Republicans in Maine will vote for her over her Democratic opponent.
