First, that's not much of a parallel. The morality of generic murder is clearcut, the morality of interference with other countries elections is not. Not everyone subscribes to prime directive. As a Russian I personally appreciate that someone is at least trying to instill some positive change in Russia.

Morals aside, you said

> It's curious this is virtually never mentioned amidst all the accusations of Russia involving itself in US elections.

I told you why. Because whatever the US did was not effective, and it's not as newsworthy as things that are happening in the US and affecting Americans.

> murder is only bad if it is successful?

If it’s nobody gets killed, it’s not murder. I think the principle that attempted murder, unsuccessful conspiracy to commit murder, or soliciting a murder which does not actually occur are lesser offenses than murder is fairly well established.

That is somewhat true, I believe attempted murder sentences are lighter than actual murder sentences.