The White House announced who will be on Trump's defense team

The material obtained from former Rudy Giulliani associate Lev Parnas is part of the official impeachment record.
5:08 | 01/18/20

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Transcript for The White House announced who will be on Trump's defense team
you very much. President trump's impeachment trial beginning in earnest on Tuesday in the united States senate. Overnight the white house announcing who will be on the president's defense team. ABC's David Wright is in Florida where the president is waking up this morning. David, good morning to you. Reporter: Good morning, Dan. Ken Starr is back. This time, not as a special prosecutor, but one of president trump's defense lawyers. The president is spending a few days in Florida ahead of next week's impeachment trial. House managers are working through the weekend preparing their case. Overnight from the house judiciary committee, a document dump. Material obtained from former Rudy Giuliani associate lev parnas, now part of the official impeachment record. No smoking guns, it would seem but the documents do include more text messages by Connecticut congressional candidate Robert Hyde claiming he was stalking former U.S. Ambassador Marie yovanovitch months before she was recalled. Did you feel threatened? I did. Reporter: Parnas told MSNBC he didn't take Hyde seriously. He's a weird character. I don't believe -- he was either drunk or he's -- was trying to make himself bigger than he was. Reporter: Hyde denies he ever visited Ukraine much less threatened the U.S. Ambassador saying he sent those texts after a few drinks. The state department and the Ukrainian government are now investigating. Meanwhile, trump has beefed up his legal team ahead of next week's impeachment trial adding Ken Starr, the former special prosecutor whose investigation of president Clinton's interactions with Monica Lewinsky triggered bill Clinton's impeachment. And former Harvard law professor Alan Dershowitz. They would be abusing their power if they impeach president trump. Reporter: Both have been vocal defenders of the president on Fox News but Dershowitz says his role in the case will be limited. I'm not a full-fledged member of his legal team in the sense that I have a limited role. I will appear one day in the senate. Reporter: As for Ken Starr trump has not always had kind I think Ken Starr is a lunatic. I really think that Ken Starr is a disaster. Reporter: In all a total of eight lawyers will be there representing the president. Now, today the house managers face a 5:00 P.M. Deadline to file a brief, essentially summarizing their case. The president's lawyers will file a response Monday. On Tuesday the trial is expected to begin in earnest. Dan. All right, David Wright in Florida, thank you. So much to talk about this morning, so let's bring in ABC news' Matthew dowd on set with us this morning. Great to see you, sir. You too, sir. Is the outcome of this trial predetermined? Well, you know, in this disruptive time it's hard to say anything is predetermined in what's going on. We thought Hillary Clinton was predetermined to be president of the United States in 2016 and we thought the new England patriots and Baltimore ravens would be playing in the -- Why dyou make it personal? Nobody thought the Tennessee titans would play tomorrow. I think the likelihood is that 20 Republicans aren't going to go against the president but I think as we've seen over the last 72 hours with all this information that's come out with parnas and other memories, and we'll see more of this, I'm sure, it's hard to say for sure what will happen. What we all want to do, watch the process, see what unfolds and ultimately see if they have witnesses at the trial in the senate. What are the big risks for the Democrats going forward here? To overplay their hand. I think the biggest risk are not Democrats overplay their hand. Some would say they already have. Well, I think as of right now, the public wants this trial to take place. But I think if the Democrats overplay this and make it way too partisan then it could be risky for them so I think there's risks on both sides. Everybody is walking across the pond that's thin and anybody could fall through, Republicans or Democrats, but I think the Democrats have to worry about overplaying their hand. Given that the odds are reasonably low that he'll be convicted and removed? The big risk for president trump and the Republicans, especially Republicans is if they vote to find the president innocent and don't convict him, if more information comes out after that happens, if more documents come out, more witnesses come forward, that puts them in a bad bind especially if they haven't asked for witnesses and voted for witnesses in the United States senate. If they're seen to have shut down sources of new information or witnesses and then information comes out subsequently? That's problematic because the majority of the country wants witnesses in the senate to Matthew dowd, always great to see you. Thank you very much. Happy birthday, A.A. Milne's birthday "Winnie the pooh." He wrote "Winnie the pooh." What character are you? Eeyore. Is he tigger? He definitely is. Tops are made out of rubber, bottoms are made out of springs. And kanga. Thanks for putting some levity into this. We'll have live coverage of the impeachment trial when it resumes Tuesday at 1:00 P.M. Eastern time.

This transcript has been automatically generated and may not be 100% accurate.

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