Joe Manchin is an anomaly. If he were not Senator the seat would be filled by a Republican. Being a Democrat he will side on some issues.
Democrats should be getting other senate seats rather than this continual fixation with Joe Manchin.
Regarding the resent abortion bill, Joe Manchin's 'No" vote was NEVER going to make a difference and it would have been politically silly for him (and even Democrats) for him to vote for it.