Andrew Mountbatten-Windsor is facing growing pressure from US officials and the family of his prominent accuser Virginia Giuffre to testify in the US about his links to paedophile financier Jeffrey Epstein.
Speaking to the BBC, Democrat Congressman Ro Khanna said the Royal Family had not been transparent, while Democrat Congresswoman Teresa Leger Fernandez said King Charles III should direct his brother to go to the US to answer questions.
Earlier on Tuesday, the King said the Royal Family were ready to support police in their inquiries.
Andrew has repeatedly denied any wrongdoing and reached an out-of-court settlement with Giuffre in 2022 containing no admission of liability.
In the King's first intervention in the latest round of revelations in the Epstein scandal, a Buckingham Palace spokesperson said if they were approached by the police, they stood ready to support them in their investigation.
It added the King had made clear...his profound concern over allegations against his brother, and the King and Queen's thoughts and sympathies have been, and remain with, the victims of any and all forms of abuse.
Thames Valley Police announced on Tuesday it was assessing a complaint by anti-monarchy group Republic over the alleged sharing of confidential material by Andrew with Epstein.
The former prince appears to have knowingly shared confidential information with Epstein from his official work as trade envoy in 2010 and 2011, according to material in the latest release of files seen by the BBC.
Andrew has been contacted for comment but is yet to respond.
When asked by the BBC if the former prince should go to the US, Khanna said that would be appropriate.
The Congressman, who co-sponsored the law that compelled the justice department to release the Epstein files last year, also said the Royal Family should come clean and lay out what they knew and what action they're going to take.
They have a large wealth, they should probably be compensating these survivors for the horrors that have taken place, he added.
Khanna said the Royal Family were finally asking for an investigation, and that these women have been denied justice.
The pressure on Andrew has increased following a release of three million more documents related to Epstein, including claims that a second woman was sent to the UK by Jeffrey Epstein for a sexual encounter with him.
Photographs appearing to show him kneeling on all fours over a female lying on the ground were also included in the latest batch of files.
Andrew has consistently and strenuously denied any wrongdoing, emphasizing that being named in the Epstein files does not equate to misconduct.
