A key part of this week's drama is likely to center on an overheard phone call from Trump to European Union Ambassador Gordon Sondland, who's scheduled to testify on Wednesday morning.

• David Holmes, political counsel at the U.S. Embassy in Ukraine, told Congress: "While Ambassador Sondland’s phone was not on speakerphone, I could hear the president’s voice through the earpiece of the phone. The president’s voice was very loud and recognizable, and Ambassador Sondland held the phone away from his ear for a period of time, presumably because of the loud volume."

But there have been weeks of this:

• Rudy Giuliani, at the center of the Ukraine interference, butt-dialed an NBC reporter, and was "heard discussing need for cash and trashing Bidens." Reporters took to Twitter and recounted their own Rudy butt-dials.
• Giuliani associate Lev Parnas' reported blabbing about his encounters with Trump may help Democrats build their case: Accounts by the WashPost and CNN have Parnas telling others he was on a "secret mission" for Trump.

And, of course, the backdrop:

• The most damaging document so far was the "do us a favor" transcript of the Trump-Ukraine call that was released by the White House.
• Trump stood on the White House lawn and said: "China should start an investigation into the Bidens."
• And acting White House chief of staff Mick Mulvaney told reporters last month, about conditioning funding for Ukraine on an investigation: "Get over it. There’s going to be political influence in foreign policy."

The bottom line: From revelations about secret servers to off-the-books diplomacy said to resemble "drug deals," many of the juiciest details about the impeachment case came not from Democrats but from Team Trump.

Go deeper:

• The schedule for this week's impeachment hearings
• Inside Republicans' defense strategy for Week 2 of impeachment hearings
• Inside Democrats' Week 2 impeachment strategy

The big takeaway from impeachment so far is that swing voters think Trump did things they don't like — but nothing impeachable, said Wes Anderson, co-founder of OnMessage Inc. and one of the pollsters who conducted the focus groups.

• Anderson said these voters "don’t have any shortage of criticisms of the president, [on] personality and stylistically. But they’re pretty happy with two or three or four specific things he's done," such as the border or China trade.
• Organizers held two focus groups each in these metro areas: Des Moines, Orlando, Charlotte, Phoenix, Miami, Atlanta, Columbus, Detroit and Pittsburgh.
• While a focus group is not a statistically significant sample like a poll, these responses can show how some voters are thinking and talking about the 2020 election.

The bottom line: The findings bolster Republicans' strategy of asking voters to assess Trump on the effectiveness of his policies, not on his governing style.

Go deeper:

• Focus group: These Ohio swing voters are outraged over impeachment
• Focus group: Trump's vulnerabilities with Minnesota swing voters
• Focus group: Pennsylvania swing voters aren't ditching Trump in 2020

• On Tuesday, as Democrats question Lt. Col. Alexander Vindman, Trump will be meeting with his Cabinet.
• On Wednesday, as Democrats grill Trump megadonor turned EU Ambassador Gordon Sondland, Trump will he visiting Apple's manufacturing plant in Texas.
• And on Thursday, after Democrats question Fiona Hill, Trump will be presenting the national medals of arts and humanities.

The bottom line: Trump, who'll cap the week by welcoming college athletes, will have built-in opportunities to address the cameras at all of these events. If he shows discipline, he can convey that he is carrying out the range of duties of the presidency while Democrats are focused on impeachment. But if last week is any guide, that's a big if. 

Go deeper:

• Inside Democrats' Week 2 impeachment strategy
• Inside Republicans' defense strategy for Week 2 of impeachment hearings