One of the cleanest, tightest bipartisan articles on the Biden - Ukraine activity during the Obama administration, authored by two governmental ethics experts.

It was a convincing explanation for me, so readers may find it helpful too. It was published a few months ago, but it is likely many readers may be unaware of it, as I was, until recently. Richard Painter was an ethics lawyer in the Bush-2 administration and Norman Eisen served a similar function during Obama years; so, bipartisan as one might want.

The Times Tribune: "Senate GOP investigates wrong family’s ties,"   By Richard Painter and Norman Eisen - Mar 15, 2020, is short and convincing, stating in part:

As bipartisan experts on government ethics, we are appalled to see that President Donald Trump and his GOP Senate enablers are reviving the canard that there are conflict issues that merit investigation relating to the Bidens and Ukraine.

As with his fabricated allegations against Hillary Clinton in 2016, Trump's election-year "alternative facts" misinformation machine is in high gear. This time it's Sen. Ron Johnson, Wisconsin Republican, and the majority on his Homeland Security Committee that threaten a subpoena.

In fact, it is the Trump family that has ethics issues that should be investigated — not the Bidens.

Trump's sons Donald Trump Jr. and Eric Trump are traveling the world at substantial cost to taxpayers while managing the president's businesses — enterprises that have racked up a stunning 3,000-plus conflicts of interest for Trump. That includes unconstitutional emoluments from the Chinese, Saudi, Kuwaiti, Malaysian, Philippine and many other governments. The president's daughter Ivanka Trump and son-in-law Jared Kushner, who as government officials are bound by federal ethics laws, have come in for criticism on the conflicts front.

Kushner is divesting his holding in Cadre, a real estate venture that profited handsomely from opportunity zones, a feature of the 2017 tax law that he and his wife worked on. Kushner and Ivanka Trump's very presence in the White House is illegal: Federal anti-nepotism law likely forbade their appointments.

Hunter Biden did not have any conflict of interest in his position with Burisma, a Ukrainian energy firm, in 2014, when Joe Biden was in government. Unlike Ivanka Trump and her husband, Hunter Biden was not a government employee during the Obama administration. As for Joe Biden, there is no requirement that officials recuse from foreign policy matters because those matters might have a financial impact on a business that has hired the official's grown child.

Adult children are allowed to live separate lives under the ethics rules. Their independent career decisions are not imputed to their parent who works in the government. But for the entanglement of the Trump children with their father's ethics issues (if the president had fully divested his conflicted businesses and avoided nepotism), we would have no cavil with them.

As White House ethics lawyers in the Obama and George W. Bush White Houses, we would not have required the vice president to recuse from matters involving Ukraine simply because his son was on the board of a Ukrainian company. [...]

 In a key paragraph the authors examine circumstances:

President Barack Obama asked Joe Biden to coordinate important aspects of U.S. foreign policy in Ukraine. He never got involved in any particular matter involving Burisma. All of the vice president's actions were fully consistent with the policy of the State Department, Britain and the European Union, our allies on Ukraine matters.

There is more to the item, quoting already is extensive, and readers can decide how to regard it. Consider, Ginni Thomas has a business life apart from her spouse being on the Supreme Court, and Elaine Chao is Trump's Labor Secretary and served in previous GOP presidential executive capacities, while her husband is in the Senate. Spousal closeness and parent-child closeness exist, but that does not mean a disqualifying conflict of interest exists. Saudi royals spend lavishly in Trump's Washington Hotel, so consider, are they buying influence by doing so?

A link. It is easy to make allegations; consider this web search. Or this web search, where Kushner and his spouse, Trump's daughter, hold government posts in the Trump administration.  Such stuff can enter into a voter's mind in making a lesser evil decision in November. The opinion here is already set. Trump has to go. Biden is no great thing, but is the lesser evil. Trump is derailed.