The American impeachment drama has taken a fresh turn with the release of new documents. Here’s a look at what they mean and what their importance might be.

The American impeachment drama has taken a fresh turn with the release of new documents. Here’s a look at what they mean and what their importance might be.

The note is an ink scribble on letterhead from the Ritz-Carlton hotel in Vienna. On the first page, at the top, there’s a highlight star, and then a summary of the enterprise’s main point: “get Zalensky to Announce that the Biden case will Be Investigated.”

The writer? Lev Parnas, a former associate of Rudolph Giuliani, President Donald Trump’s personal lawyer. The note...