I have some bad news. There are about a half-dozen ways the Roy Moore situation can play out, and most of them are wins for the GOP. As unbelievable as that is – that nominating a pedophile could end up benefiting the party – don't act like you're entirely shocked. This is 2017 after all.
Here are some outcomes.
1. Moore stays on the ballot and loses to Doug Jones. Democrats get a brief win out of this, since Jones would run and presumably lose in 2020.
2. Moore wins, the GOP and its slim majority expel him from the Senate, and Alabama's Republican governor appoints a replacement. This is the most likely outcome, I believe, and is a huge GOP win. This enables them to present themselves as heroes and do lots of phony moralizing about how they just cannot condone this man, and then he gets replaced by some totally generic Republican who doesn't cause anyone any trouble. Democrats would have to go along with the vote to expel him – how could they not?
3. Moore withdraws and is replaced by another Republican who wins. Same as #2 but without the added "We gallantly saved you from this man" talking points.
4. Moore withdraws and is replaced by someone who doesn't end up appearing on the ballot, leading Moore and Other Republican to split votes and hand Jones a victory. See #1.
5. Someone like Jeff Sessions is pushed as a write-in or Independent candidate at the last minute. This would be a power play by the GOP leadership in the Senate to sink Moore's chances of winning. A write-in most likely would not do well enough to win, but would certainly tip the balance in a close Jones-Moore contest.
6. Moore wins and then a couple of GOPers in the Senate balk on expelling him for whatever nonsensical reason they whip up on the spot. The party holds the seat but exposes itself to an endless barrage of "They welcomed a child molester into their club; worse, they lied about it" attacks.
7. America disbands after realizing that the mere fact that we're having a conversation about a pedophile who has a 50-50 shot to be elected to the Senate means that we're entering the decadent Late Roman Empire stage of our decline and at this point we're just killing time until the Goths sack DC.
I think plenty of Alabamians have time to talk themselves into believing that a bland Democrat is actually worse than a kid-diddler, but I also think the Senate GOP is sincere about expelling him. So, I'd bet on #2 if forced to choose. #7 sounds pretty good too, honestly.