Federal investigators have recently intensified their scrutiny of Jim Biden's business dealings, specifically focusing on his health care dealings in Pennsylvania and Florida as part of criminal cases. The investigations are exploring allegations of Medicare fraud in Pennsylvania and transactions linked to a collapsed hospital chain in South Florida, including possible improper loans. Despite the ongoing investigations, Jim Biden's lawyer has stated that he is not currently under investigation in either case. The investigations remain open, highlighting the growing legal scrutiny surrounding the business activities of the President's brother.