Hunter is coming off as a greasy character. He's withheld child support since November 2018 for a child he denied was his until a DNA test proved him wrong, and has denied handing over his financial records to the court. He has yet to produce those financial records.The public might respond favorably if Joe gets fed up with this crap going after his son and cuts loose one time. The sacrificial lamb might morph into an indignant parent defending his only living child. “Have you no decency?”
Of course this has nothing to do with Trump's impeachment but it does place doubt in the minds of voters about his character. The character assassination of his father has been accomplished through association. "If Hunter won't even pay child support, won't claim his child, and he wasn't qualified for the million dollar a year job at Barisma, well you know ... the apple doesn't fall far from the tree." Or something like that.
I hope you are right and I am wrong.