The Biden's haven't hidden anything. Republicans have been investigating now for more than 5 years and they've still found nothing to indict anyone in the government on. Added to which, this loan repayment was made when Biden was a private citizen and not even in office.
This is in direct contrast to investigations of Donald Trump. 5 years of investigations results in over 200 indictments being filed by the Mueller Investgation, 9 convictions/guilty pleas, and over $40 million in fines and taxes recovered.
The various other state and federal charges in the wake of January 6th, have resulted in 91 indictments. Now you're whining that the Bidens are being uncoopertive???? After 5 years of complying with everything asked of them.
Ask that of President Trump who had to be taken to the Supreme Court before he'd even let his staff testify, much less reveal anything about his personal finances. And when we did see his tax returns, they proved he'd been evading income taxes for years.
Even the Trump appointed federal judge in the Hunter Biden case commented on how much time, money and effort has gone into the Hunter Biden investigation, only to bring two misdemeanor charges. Is this the best use of government resources.
And before you ask, you can google all of it, asshole.