IRS special agent Joseph Ziegler, a whistleblower who testified before Congress on Wednesday, said in an interview this week that numerous roadblocks were put in front of him during his investigation into President Joe Biden’s son, Hunter.

CBS News reporter Catherine Herridge asked Ziegler, “Did you uncover evidence that President Biden financially benefited from his son’s deals?”

“I don’t feel comfortable answering that question,” Ziegler responded. “Any time we potentially wanted to go down the road of asking questions related to the president, it was, ‘That’s gonna take too much approvals, we can’t ask those questions.’ And I mean, it created an environment that was very hard to deal with.”

Ziegler said that the response he would get when he tried to press the issue was, “Let’s put that on the back burner.”

EXCLUSIVE: Hunter Biden IRS whistleblower Joseph Ziegler tells @CBS_Herridge anytime IRS investigators potentially wanted to ask questions related to President Biden, they were told "That's gonna take too much approvals. We can't ask those questions."pic.twitter.com/aitPxKpyUb

— Catherine Herridge (@CBS_Herridge) July 19, 2023

Ziegler said that the only question that matters at the end of the day is, “Are we treating everyone the same? Are we treating all taxpayers the same?”

“And in this case, no, I don’t think so,” he said.

“It's a matter of are we treating everyone the same? Are we treating all taxpayers the same?" Hunter Biden whistleblower Joseph Ziegler tells @CBS_Herridge in an exclusive interview. "And in this case, no. I don't think so." pic.twitter.com/OpjKuRDrug

— Catherine Herridge (@CBS_Herridge) July 19, 2023

Ziegler said that he wanted to interview Hunter Biden’s adult children because “a lot of the business deductions, expenses, [were] related to the adult children.”

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When asked whether he got approval to ask, he said, “We never received the approvals to talk to those people” because he was told by the Assistant U.S. Attorney that doing so was going to get them “into hot water.”

“Is that in the IRS handbook, avoiding hot water?” Herridge asked.

“No, but I mean, I was asking to do these certain things and roadblock after roadblock was put up in front of me,” he said.

EXCLUSIVE: Hunter Biden IRS whistleblower Joseph Ziegler tells @CBS_Herridge that he wanted to interview Hunter Biden's adult children, but was told by an Assistant U.S. Attorney that doing so would "get us into hot water."pic.twitter.com/IOGH5tf5zL

— Catherine Herridge (@CBS_Herridge) July 19, 2023

George Washington University law professor Jonathan Turley said a House Democrat “tripped the wire” on President Joe Biden during a hearing Wednesday.

The legal expert argued that an exchange between Rep. Dan Goldman (D-NY) and one of the witnesses, Internal Revenue Service (IRS) whistleblower Gary Shapley, undermined the president’s denial that he ever spoke to his son Hunter about the younger Biden’s business dealings.

Goldman pointed to a moment in Shapley’s prior testimony in which he quoted Hunter Biden business associate Rob Walker informing the FBI that Hunter Biden told his father at a lunch meeting with executives at the Chinese energy firm CEFC, “I may be trying to start a company or try to do something with these guys.”

“Now, let me ask you something,” Goldman said. “That doesn’t sound much like Joe Biden was involved in whatever Hunter Biden was doing with the CEFC, if Hunter Biden is telling him that he’s trying to do business with them, does it?”

Goldman: So you not only have no direct evidence connecting Joe Biden to any of Hunter Biden's business deal. You actually had proof that he wasn't involved. That is the proof that you had. pic.twitter.com/GYyYhlQDDb

— Acyn (@Acyn) July 19, 2023

In response, Shapley said, “No but it does show that he told his father that he was trying to do business and he was talking to his father about the business.”

At that moment, Goldman threw his hands into the air and said, “Okay, well that is true. Hunter Biden does try to do business. That’s correct.”

On Twitter, Turley said Goldman “just tripped the wire on Joe Biden,” adding, “In trying to grill the whistleblowers to show that there is no evidence that Joe Biden was involved, he elicited an answer that the witnesses established that Joe Biden did discuss business deals of Hunter with the Chinese.”

“Goldman was trying to show that the witnesses did not mention a substantive role of Joe Biden, Shapley immediately noted that it did mean that he came to discuss one of the Hunter’s deals. The President continues to deny that fact,” he added.

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“Goldman prompted a sworn statement from the investigator that Biden did indeed discuss his son’s business deals,” Turley said. “In doing so, Goldman may have delivered one of the most damaging moments in the hearing for the Bidens.”

After Shapley made his point about Joe Biden talking to his son about business, Goldman went on to state that the IRS agent had “no direct evidence” connecting Joe Biden to Hunter Biden’s business deals before moving on with his questioning.

Turley, in ending his Twitter thread, said if Goldman had continued his line of inquiry about the Biden business deals for a few more minutes, it would have “sealed the case” for the appointment of a special counsel.