Ahead of this week's subpoenas and depositions, new documents obtained by Axios show how Democrats are taking the impeachment inquiry in two tightly focused directions: Ukraine and obstruction of justice.

Why it matters: There are new temptations for Democrats to broaden the scope of their inquiry after developments last week including President Trump's gift to Turkey, new questions about coordination with the Chinese over Hunter Biden, and the dramatic airport arrests of two of Rudy Giuliani's associates with Eastern European backgrounds and their indictments on campaign finance violations.

But for now, House Speaker Nancy Pelosi appears to be sticking with her instincts to keep the probe tight and as simple as possible for Americans to understand.

Driving the news: If the document request for Trump's former Russia adviser Fiona Hill, reviewed by Axios, is a road map for what Dems plan to ask Trump administration officials this week — and committee sources tell me that it is — then the inquiry remains focused on Ukraine and has not yet branched out into other countries.

Below are some of the key areas of interest to the committees, as outlined in their Oct. 9 letter to Hill: