Either this was "selective" prosecution against a political opponent, and so was the multi-pronged attack on Trump by the Soros-sponsored D.A.'s who campaigned on the promise of going after Trump (until it was no longer useful to do so), or it was every bit as valid of a criminal investigation as you proclaim the latter to be.
I will save you the response of "but Hunter isn't the President." Hunter and daddy are joined at the hip in this little venture, and only a liar would pretend otherwise.