Eric Tucker and Alanna Durkin Richer | Associated Press

Former FBI employees involved in the investigation into President Donald Trump’s retention of classified documents have been subpoenaed to appear before a grand jury in a broad Florida-based conspiracy probe.

The former Florida attorney general is a longtime Trump ally and was one of his lawyers during his first impeachment trial when he was accused — but not convicted — of abusing his power as he tried to condition U.S. military assistance to Ukraine on that country investigating then-former Vice President Joe Biden.

UPDATED: Donald Trump became the first former president to face a judge on federal charges as he pleaded not guilty in a Miami courtroom Tuesday to dozens of felony counts that he hoarded classified documents and refused government demands to give them back.