In fairness, Donald jr. had no god damn idea what the laws were and he saw "ohh, dirt on Hillary, I'll take that" but since he didn't do anything, all this shows is potential intent to manipulate from a single person who may or may not have done it on behalf of the government.
And, of course, there was no incriminating evidence so either
A) That part is a lie and there was something (or they talked about helping)
or
B) This was just an attempt to get face time with the campaign to promote a repeal of a law. Lobbying, basically.
And I'd say "Wow, you'd have to be an idiot to support someone's proposal when they lie about what they have" but that's basically Trump's entire campaign platform: Promise vague shit but have nothing actually done on it.