But Kendall said Clinton has already answered questions from the Federal Bureau of Investigation and the congressional committee investigating the 2012 Benghazi attacks that killed four Americans. Some of those documents could ultimately become public as part of a Freedom of Information Act lawsuit filed by the conservative group, Judicial Watch.
"Second, it is both significant and disturbing that Hillary Clinton now asserts a private "claim of right" over her non-state.gov email account, including any of the 55,000 pages of federal records she returned to the State Department".
"Judicial Watch now has available to it a vast public record on this subject".
"It's clear that, a little over an hour into today's hearing, Attorney General Lynch has no intention of answering any of our questions regarding the department's decision not to charge former Secretary of State Hillary Clinton, even the most basic questions about the legal elements the government is obligated to prove in a criminal prosecution", Goodlatte said in a statement.
But Mr. Comey, a former prosecutor and top Justice Department official himself, said Mrs. Clinton was too unsophisticated to understand the technology or the classification system for him to prove she meant to mishandling the information - and he concluded no prosecutor could make a case.
Democrats also had questions for Lynch, which she was more than happy to answer.
Lynch is making her first appearance before Congress since the Justice Department closed its investigation without bringing criminal charges. She also has said she only used one mobile device for emails and turned over all her work-related emails to the State Department.
Judicial Watch said the FBI finding raised questions about Clinton's statement in an August 8, 2015, affidavit that she said her lawyers had handed back all potential federal records.
In his first public response to the closed investigation, Kendall wrote, "the FBI concluded after its year-long investigation that Secretary Clinton did not intend to hide records from the public".
Director Comey, a long-time Republican of unquestioned integrity, went on record under oath saying he was unsure whether Mrs. Clinton had the technical sophistication to know what the tiny "c" markings buried somewhere in the material might mean. The group has filed several lawsuits seeking records from government agencies related to Clinton's tenure as the nation's top diplomat from 2009 to 2013. A judge is set to make a decision on whether Clinton must testify at a later date.
"In light of those contradictions, the department should investigate and determine whether to prosecute Secretary Clinton for violating statutes that prohibit perjury and false statements to Congress, or any other relevant statutes", the two congressmen wrote.
However, Comey concluded, "We believe our investigation has been sufficient to give us reasonable confidence there was no intentional misconduct in connection with that sorting effort".