I'm not sure it breaks any laws in the way you described.
However, what you're leaving out is whether or not the Russian representative broke the law to acquire the "really bad shit". If you're aware of US Laws being broken and do nothing about it and, in fact, seek to benefit from it...the electorate should be made aware that you have no respect for the law.
In this case, Roger Stone, a Trump Associate admits to interaction with Guccifer (the Russian hacker US intel concludes hacked Ms .Clinton's e-mails) and even tweeted that her campaign manager will "have his turn in the barrel" six weeks prior to the release of his hacked files. Why a man with the President's ear is chatting with a hacker is mind boggling in and of itself.... That the hacker is probably responsible for breaking the law and Mr. Stone and Mr. Trump did nothing about it...tells you all you need to know about how seriously they take our electoral process.
so? what would you do to the Russian guy? tell us please.
Not much you can do to the Russian guy/guys.
You can impanel grand jurie(s) to compel the under oath testimonies of Stone, Flynn, Bannon, the President, the VP, etc and as we saw with Whitewater, it can go ANYWHERE from there. Those who don’t testify can be held in contempt with any punitive action taken as a result. As I recall, jail time is usually a remedy for that.
You can also subpoena the hacker(s). I doubt they’d show up. But it would be fun to monitor their bank accounts (they’d be fools to get paid in rubles) and watch them swell and trace that money back to Washington, New York or Mura Lago….
“What did the President know and when did he know it…..”