Special counsel Jack Smith’s decision to subpoena Ivanka Trump, the daughter of Donald Trump, is a “big deal,” according to legal analyst Glenn Kirschner.

Smith was appointed to investigate the role of the former president in the Jan. 6, 2021 takeover of Congress by his supporters, along with associated efforts to overturn the 2020 presidential election.

On Wednesday, the New York Times reported that Ivanka and her husband, Jared Kushner, who worked as advisers in the Trump White House, had been subpoenaed to testify about what they know before a federal grand jury.

It came just weeks after Smith cited Mike Pence, Trump’s vice president, who challenged his boss by certifying the result of the 2020 presidential election in Congress.

Speaking on his YouTube show justice issuesKirschner, a former US Army prosecutor with 460,000 subscribers, said: “Special Counsel Jack Smith continues to move at lightning speed, seems to have a real ‘take no prisoners’ approach to investigating, until he starts to take prisoners.”

Kirschner noted that Julia Radford, Ivanka’s former chief of staff, had appeared before the House committee that investigated the Jan. 6 attack. She claimed the president’s daughter had been in the Oval Office, where she overheard him consulting her vice president about not blocking voter certification.

He continued: “Presenting that kind of evidence before the grand jury investigating Donald Trump’s responsibility for the insurrection, for the deadly attack on the Capitol, is a big deal.

“Why is this a big deal? Because Donald Trump’s own daughter is going to present clearly incriminating testimony proving that her father was waging a pressure campaign against his own vice president, trying to get him to join the Trump conspiracy, trying to get him to commit a number of federal crimes.

“Donald Trump was consulting and belittling and pushing and threatening and taunting and ridiculing his own vice president, trying to convince him to go to Capitol Hill on January 6th and break the law, break the Election Count Act. Donald Trump was trying to convince his vice president to go to Capitol Hill and obstruct official congressional proceedings certifying Joe Biden’s election victory.”

Trump has repeatedly denied any wrongdoing related to the January 6 attack and claimed special counsel Smith is “far left” and “works hard to scare and intimidate witnesses,” on his Truth Social website.

Despite the investigation, Trump continues to claim that the 2020 presidential election was “rigged” against him, despite the claim being repeatedly rejected in court and even by some Republican legal experts.

Smith is separately investigating whether Trump committed any federal wrongdoing in his handling of confidential government documents, which the FBI recovered in August at his Mar-a-Lago resort.

Ivanka and Donald Trump have been contacted for comment, via the Trump Organization.