At the very most superficial level it shows that Trump and those he installed in his cabinet are willing to covertly strike deals with foreign agencies while leaving U.S. intelligence out of the loop.

And it's for personal benefit. Directly.

It involved withholding aid taxpayers already paid for and was set aside for aiding Ukraine.

And there's a good chance, given how he asked for their assistance, Trump may have solicited Russia to interfere with U.S. elections.

Also, the president of Ukraine that was actually investigated and convicted of corruption was the man who Trump's campaign manager got elected in Ukraine. His campaign manager was Paul Manafort.

Paul Manafort also suggested Pence as a VP to Trump, and today it's come out that Pence was actively participating in extorting Ukraine for aide that the American people already paid for.

Manafort is behind bars. He worked for Trump "for free".