Biden White House secured Trump's phone for FBI in Jan. 6 probe: new emails from Grassley, Johnson | 8 April 2025 | Senate Judiciary Chair Chuck Grassley and Senator Ron Johnson published new emails from FBI whistleblowers showing that President Joe Biden's then-Deputy White House Counsel Jonathan Su personally assisted the FBI in securing President Donald Trump and Vice President Mike Pence's cell phones to assist the nascent "Arctic Frost" investigation over January 6. The new whistleblower emails also show that a future member of Special Counsel Jack Smith’s team and an anti-Trump FBI agent were closely involved in the origins of the FBI probe. Operation Arctic Frost formed the basis of former Special Counsel Jack Smith's false elector case under which former President Donald Trump was later charged with a conspiracy to defraud the United States for his campaign's attempts to assemble alternate slates of electors under claims that the 2020 election had been stolen. The new emails are contained in a letter the senators sent to Attorney General Pam Bondi and FBI Director Kash Patel urging cooperation with their requests for all information related to the FBI probe.