The court asked the parties to address whether the court even has the ability to decide who should prevail in the dispute.

Lower US courts have upheld US House of Representatives' use of committee subpoenas for Trump's financial records dating back years from his longtime accounting firm Mazars USA, and from Deutsche Bank and Capital One.

House investigators contended they needed the information as the House was considering new legislation related to money laundering and government ethics.

Trump's lawyers, who intervened to stop the subpoenas directed at Trump accountants and banks, reject the contention of a valid legislative purpose, saying that if those grounds are affirmed, any committee would force presidents to relinquish information by claiming it was writing legislation.

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