If not, what does that say about Bill's respect for Hillary and their marriage? What does staying with Bill despite this say about Hillary?
Trump's been divorced how many times? And how many people has he admitted to cheating on his wives with? So what's that say about him?
Bill clearly doesn't respect monogamy, but people are freaking weird. Some folks respect the heck out of their spouses in all aspects but monogamy, and some spouses are monogamous and treat their spouse like crap. Monogamy is a deal breaker for a lot of people, but monogamy alone doesn't make for a great marriage.
As for their marriage? Clearly they're partners in a lot of things. Political ventures, the Clinton Foundation, policy. They work together frequently and support each other, which is far more than a lot of monogamous couples do. If she stays with him, that means despite his issues she sees their partnership as something she values. And that means despite the fact he can't keep it in his pants, he sees their partnership as something worth preserving too.
By the way: There's a fair amount of Christians that are anti-Divorce even in the case of cheating or abuse. That vow is sacred in a lot of folks eyes and there is nothing either party can do to break it. Staying with someone and working it out is the toughest thing you can do. I don't see that as weakness.