If it's something they did many years ago, I couldn't care (with exceptions). Especially for breaking laws I strongly oppose. People are allowed to mature and change as they age, I don't understand why digging up things from decades ago and turning them into some sort of moral panic is a thing people do.
That being said, some people don't mature and change as they age. Doug Ford probably being a good example.
Wasn't Smitherman at one point held hostage by having done amphetamines or whatnot back in the day? Pure rubbish that was. Having to apologise for it as if it somehow made him less fit for public office or less of a person which it did not. He was unfit for many other reasons.
If the person has recently or is currently breaking the law, then that's a completely different story.
I'm a law-abiding citizen and respect almost all laws. I just think the war on drugs is one of the biggest wastes of life, time, and money in the name of a spurious morality based in ignorance and is completely self-defeating, illogical, and shameful. If he was dealing drugs now I might have something to say against him on that count because elected officials obviously need to be seen to be upholding the laws of the land....even the destructive ones, I suppose.