One of the most important issues in President Trump’s impeachment defense is also one of the least explored: To what degree were Trump’s concerns about Ukraine valid? It’s well documented that the president fixated on Ukrainian activity in the 2016 election and on the Bidens’ actions in the Burisma matter. Democrats and many in the media dismiss his concerns as “conspiracy theories.” But to what extent were those concerns, in fact, legitimate?

If they were even mostly legitimate, then Trump defenders could say: “Look, he had a point. Even if one thinks he handled the issue inappropriately, the fact is, what was going on in Ukraine was worrisome enough for a United States president to take notice.” That would not change minds among those dead set on impeachment, but among others, it would make the case for impeachment and removal much harder to make.