Transcript for Trump's sons defend father, dismiss Russia investigation as 'witch hunt'
He's been their father, their boss, and now their commander in chief. So if anyone can shed light on the inner workings of president trump, either Rick and donal Jeremy Hubbard. Now at the helm of the trump brand. Planning a major expansion of this their hotels into what they see as trump territory. They spoke with ABC's Tom llamas about their father's latest troubles in Washington. Reporter: Arriving in style. A page right out of his father's playbook. I'd say this entrance looks familiar. Good to see you. Reporter: Eric Trump taking me for a spin around trump national golf club just outside of D.C. It's a different world now. What's it like doing all this without your dad? Reporter: Brother don giving me a tour of what's next for the family empire. He was such a great sounding board. Not having that is definitely something you miss. Reporter: Now as the president navigates a busy week in Washington, the first sons sitting down with ABC news, talking family, controversy, and the trump brand without the top trump. This week is going to be a very big week for your father. Former FBI director James Comey's going to testify on capitol hill. Are you going to watch? Sure, absolutely. It's the greatest hoax of all-time. I was there throughout the campaign. We have no dealings in Russia, we have no projects in Russia, we have nothing to do with Russia. To me it's without a question, reads and smells like a witch hunt. Reporter: The day before president trump fired FBI director James Comey, don and Eric met with FBI agents in new York to discuss what sources told ABC news was an attempted cyber attack on the trump organization. Obviously as a do in America we're susceptible like so many others to potential cyber attacks. So that was the extent of what I can actually talk about. Did you ever discuss with your father that you had met with the FBI? No we did not. Was the Russia investigation ever discussed? No. It was a totally separate topic. The next day after that meeting your father fires James Comey as head of the FBI. Did you discuss that initial meeting with your father? No it had nothing to do with the subject. Did you ever discuss with your father -- No -- Meeting with FBI agents? No, I did not. Have you been asked to testify before congress or turn over any documentation? I have hat not. Do you think your brother-in-law Jared Kushner made mistakes by talking with Russian businessmen with the ambassador of Russia after the election? I don't think he did. I think that would be probably pretty common for any administration to have conversations, but I don't know the extent of any of those conversations so I can't comment in detail. A lot of people have talked about how your father is doing things differently in Washington, D.C., doing it his way. Some people of what wondered if he's too cozy with the Russians. He brought in the foreign minister, the ambassador, into the oval office. Not quick to criticize Vladimir Putin. Do you understand why some people may be suspicious about that? He made it very clear early on and even during the campaign, hey, if we can have a good relationship with perhaps the second-largest super power in the world, why not? Now maybe we can't. But to not try and just make them the enemy seems very foolish. Reporter: Yesterday a federal contractor was arrested and charged with leaking top secret NSA unless about alleged Russian interference in the 2016 presidential election to the news outlet "The intercept." Her attorney saying she's a good person with no criminal history who was caught in a political whirlwind. This the latest in a series of leaking scandals that have plagued the white house. Trump's sons questioning the loyalty among their father's team. Are you satisfied with the team he has around him ligright now? I am, the immediate team. But I do think there's plenty in D.C., probably plenty still in the white house, plenty of hold-overs that aren't necessarily working in his best interests. You think there's people that are actively working against him? I think without question. Reporter: A few friendly faces from home, a constant in the west wing. What do you think about Jared and ivanka in Washington? Do you think they're enjoying their time there? I think they're doing just what needs to be done like my father. Do you wish he would have tapped you to go to the white house? I think in terms of personality, think ivanka's probably the right person to be there. Reporter: With president Donald Trump in the oval, it's the sons who are now in charge of the family business. Eric showing me around one of their properties just two weeks ago. You and your brother were involved in the campaign, do you miss that? That was your life for two years. I think I'll always fight together with family. Do I miss politics? Not really. Reporter: But lessons from the campaign trail helping forge a new business path for the company. Budget-friendly hotels built in trump country called "American idea." Between Eric, myself, we've stayed in every one of these hotels in every little market in the country. We saw there was a void missing. Critics may say, American idea, are you trying to make money off of politics? It has nothing to do with politics, we're trying to make money off a hotel brand we feel there's an underserved market in. Reporter: As for their father and his role in the company -- They're not going to discuss it with me. Reporter: Eric says they do discuss bottom-line issues about the company with the president, including profit reports. We don't talk about activities of the business. We don't talk about what we're doing in the business. We just don't mix the separation -- Showing profit reports doesn't blur the lines? No, you're not allowed to show that. The president of the united States has zero conflicts of interest, zero. Reporter: Despite that, alleged ties to fortunate governments continue to dog the trump family. This week reports a trump property received $270,000 from Saudi Arabia. The trump organization telling ABC news, "We intend to donate the profits of this transaction at the end calendar year." And the brothers clear that the company will not expand overseas while their father is in the white house. What was the international interest like after the election? We canceled more deals than you can possibly imagine. We said, he's won this thing. We can't do this, it's not going to look right. Tens of millions, billions? Hundreds of millions if not millions of dollars worth of deal wet canceled. Reporter: It's at courses tleek where the trumps host charity events. But a day after we sat down with the brothers, "Forbes" magazine reports hundreds of thousands of dollars in charity expenses went to the trump family miss despite Eric saying many of the costs would be covered by the trumps. Eric Trump responding to Sean hannity tonight. Every $16.3 million for the greatest hospital in the world, St. Jude, and I get attacked for it. Reporter: A spokesman saying, contrary to recent reports, at no time did the trump organization profit in any way from the foundation or any of its activities. Eric and Donald Trump Jr. Reporter: Although they're both private citizens, the brothers can't hide from the spotlight. The only people making decisions regarding the trump organization are Eric and myself. Dad? No, no. What's it like watching yourself on "Saturday night live"? It's sort of funny. Something that wasn't funny is what happened with Kathy griffin. I was pretty disgusted. "A sitting president of the United States and his grown children and the first lady are" -- Personally trying to ruin my life forever. Everyone watching right now saw what happened. They saw my father's response, they saw the first lady's response about her soon and how it affected him. They saw my response. I don't think we've ever been so measured perhaps on a relative basis. Then to run and claim victimhood -- she deserves everything that's coming to her. Reporter: After his work on the campaign and that rousing RNC speech -- We'll have made America great again. We've been doing it a long time. Reporter: I have to wonder if don is eyeing a run himself. I think eventually if it was ever something, it would probably be more governorship or -- I don't want to shut anything out but right now I'm focused on what we're doing here. Reporter: It's back to business but not before that picture-perfect ending only a trump could expect. I may not be old enough to vote but I'm a big fan of president trump. Thank you. You hear that? Hear that? I love this one. Reporter: For "Nightline" I'm Tom llamas in New York. Our thanks to Tom. And on Thursday, ABC news will carry former FBI director James Comey's testimony live with a special report beginning at 10:00 A.M. Eastern.
This transcript has been automatically generated and may not be 100% accurate.