JAMES FREEMAN: Hillary Clinton and Ukraine: A letter released Monday raises questions beyond the Bidens.

The Biden clan still needs to explain why a vice president’s son was enjoying a $50,000-per-month gig for which his principal qualification appears to have been his last name. But Joe Biden isn’t the only pillar of the Democratic establishment who won’t enjoy the new spotlight on American relations with Ukraine. And President Donald Trump isn’t the only one who wants a fuller accounting of that country’s role in the 2016 U.S. presidential election.

In a letter released on Monday morning, Republican senators Chuck Grassley of Iowa and Ron Johnson of Wisconsin ask U.S. Attorney General William Barr if he’s trying to answer the lingering questions. . . .

The senators aren’t relying on reports from conservative bloggers. The quotations come from a 2017 story in Politico, hardly a pro-Trump outfit. “Ukrainian efforts to sabotage Trump backfire,” read the headline on the article by Kenneth P. Vogel and David Stern. “Kiev officials are scrambling to make amends with the president-elect after quietly working to boost Clinton,” said the subhead of the article, which was published shortly before Mr. Trump’s inauguration.

The authors reported that Ukrainian government officials “helped Clinton’s allies research damaging information on Trump and his advisers” with the goal of “advancing the narrative that Trump’s campaign was deeply connected to Ukraine’s foe to the east, Russia.”

With the benefit of hindsight and the results of the Mueller investigation, it’s now clear that there was no evidence of Trump campaign collusion with Russia. What is not clear and what demands further investigation is how this baseless claim managed to consume the first two years of an American presidency.

We need to get to the bottom of this — and the fear that we will is why the Democrats and their press enablers are getting so crazy.

Flashback, March 2017: “Hypothesis: The spying-on-Trump thing is worse than we even imagine, and once it was clear Hillary had lost and it would inevitably come out, the Trump/Russia collusion talking point was created as a distraction.”