The Republican Chairman of the Senate Judiciary Committee, Sen. Chuck Grassley (R-Iowa), accused Hillary Clinton of giving her lawyer top secret and classified materials through email, according to McClatchyDC. Clinton recently turned over more than 30,000 emails to the State Department for an ongoing investigation. David Kendall, Clinton's lawyer for the past two decades, said that "none of those emails" were classified. 

Kendall says he received security clearance from the State Department in order to review information concerning the House Benghazi investigation, including Clinton's emails. Grassley says that clearance was not in place, according to Politico.

"These State Department security clearances remain active. We obtained them in order to be able to review documents at the Department of State, to assist former Secretary Clinton in preparing to testify before the House Select Committee on Benghazi," Kendall said in a letter to Grassley, Politico reported.

Clinton used a home server for her email transactions, a unique complication to the investigation surrounding the Benghazi event. She used her home server instead of the State Department's email system, but experts say that both servers were equally at risk to hackers, according to SFGate.

Hillary Clinton is the Democratic frontrunner in the upcoming 2016 primary election.