As televised impeachment hearings roll into Week 2, one surprise has been how many of the Trump team's wounds have been self-inflicted, because of his allies' curious habit of leaking on themselves.

Why it matters: The leaks and revelations have thrown President Trump into a constant state of defensiveness, and turned a growing number of Republicans into frustrated, sometimes bewildered, defenders.

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.

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