Transcript for Trump blasts special counsel Robert Mueller and Russia investigation

Thank you very much. We'll talk politics now and president trump on the offensive overnight in classic style. A marathon speech taking aim at the Mueller probe as this country awaits the findings of a high-stakes investigation. The white house also facing a looming deadline to comply with Democrats' demands in issue with Jared Kushner's white house security clearance. ABC's white house correspondent Tara Palmeri is at the white house with the latest. Good morning. Reporter: Good morning, whit. No topic went untouched. The president seemed to suggest he is being attacked on all fronts from the house Democrats the justice department and the new 2020 challengers. After a bruising week, the president letting off some steam before a live audience, firing off his strongest language yet against the special counsel's Russia investigation. And all of a sudden, they're trying to take you out with Reporter: With Robert Mueller's probe reportedly wrapping up, trump suggesting a broad conspiracy by unelected justice department officials to remove him from office. Now Robert Mueller never received a vote and neither did the person that appointed him. Now we're waiting for a report and we'll find out whether or not and who we're dealing with. We're waiting for a report by people that weren't elected. Reporter: Speaking before a crowd of supporters at a conservative conference in Washington, it was one of the president's longest speeches since taking office. Two hours. You know I'm totally off script right now, and this is how I got elected, by being off script. Reporter: Trump blasting house Democrats for their new oversight powers. There is no collusion, so now they go and morph into, let's inspect every deal he has ever done. We're going to go into his finances. We're going to check his deals. We're going to check -- these people are sick. Reporter: The white house facing a Monday deadline to turn over documents to the house oversight committee about how the president's son-in-law, Jared Kushner, obtained a top secret security clearance. The request was made fire five weeks ago, but "The New York Times" now reporting on a memo by then-white house counsel, don mcgahn in which he recommended against top security clearance for Jared Kushner, citing concerns from the CIA. "The times" also says John Kelly wrote a memo saying trump ordered him to give him clearance. An executive decision his daughter, Ivanka Trump, denied. The president had no involvement pertaining to my clearance or my husband's clearance, zero. Reporter: House Democrats are also actively preparing requests for the president's tax returns. Senior congressional aides tell me that initially they were going to wait for the Mueller report to be released, but Michael Cohen's testimony has injected a new urgency. He raised questions over whether he inflated or deflated his need for tax insurance purposes. Good news. We have a ringer here. George Stephanopoulos. Good to see you. We saw in the report, the president going hard overnight at Mueller and the Democrats and this approach seems to be working. The people in the room loved it and his base is sticking with him. Republicans have completely fallen in line. The president's approval rate close to 90%. One of the things we saw at the Cohen hearing, all the Republicans down the line attacking Michael Cohen implicitly defending the president even though they showed no interest in the issues Cohen was raising at the time, and as long as that holds, that's going to be a bar to Democrats who are seeking impeachment of the president. It will be difficult to move forward on impeachment if the Republicans have that hard line in support of the president, but we don't know whether that will change in the wake of the Mueller -- nor do we know what he's going to report or whether that, and in the wake of more investigations from Democrats. Tara just talked about Democrats requesting the president's tax returns. You have now got at least a half dozen committees in the house investigating various parts of the trump administration and one of the things we'll see over time is whether that chips away at the president's support among Republicans. Right now though, it's very strong. I want to pick up on what you are talking about the Democrats investigating. On the show, you have got Jerry Nadler who is the chairman of the judiciary committee. Charge of impeachment proceedings. What do the Democrats go after next and what are the risks? They could overreach. That's one of the big questions I'm going to ask chairman Nadler this morning, whether he has seen enough to justify impeachment proceedings yet, and what he's waiting for. One of the things he has said in the past and he actually said this about the Clinton impeachment as well is that you need some sort of bipartisan support to make impeachment. That may be at the end, but what is the trigger for any investigation? One thing for sure you are going to see a host of investigations from Democrats on a number of different issues in the coming months. Look. There is a risk here. They could end up looking over -- One thing you're hearing is Republicans talk about impeachment more than Democrats because of that risk. It will depend on where the evidence is at the time. George, thank you. Have a great this show this morning. I want to remind everybody. George has a big show as usual. One-on-one with the house judiciary chair, Jerry Nadler, and also the house minority leader, Kevin Mccarthy. Plus, the governor of Washington, Jay inslee discussing his climate change that's all coming up on "This week" later this morning on ABC. Thanks, George. Thanks, guys. The Pentagon announcing that

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