EXCLUSIVE: WASHINGTON—A previously identified anti-Trump FBI agent allegedly broke protocol and played a critical role in opening and advancing the bureau’s original investigation related to the 2020 election, tying President Donald Trump to the probe without sufficient predication, whistleblower disclosures obtained by Sen. Chuck Grassley revealed. That investigation into Trump was formally opened at the FBI on April 13, 2022, and was known inside the bureau as "Arctic Frost," Fox News Digital has learned. EX-FBI OFFICIAL WHO SHUT DOWN HUNTER BIDEN LINES OF INVESTIGATION VIOLATED HATCH ACT WITH ANTI-TRUMP POSTS Senate Judiciary Committee Chairman Chuck Grassley and Permanent Subcommittee on Investigations Chairman Ron Johnson shared internal FBI emails and