Two high-ranking Republican senators are criticizing Hillary Rodham Clinton’s use of a personal email server, and one says Clinton likely violated federal law.

Iowa Sen. Charles Grassley is chairman of the Senate Judiciary Committee. Grassley says Clinton made a “great big mistake” by using a private email account for public business while she was secretary of state. Grassley tells Newsmax TV the use of a private server “probably violates the Freedom of Information Act” and national security laws.

Texas Sen. John Cornyn is No. 2 Republican in the Senate. Cornyn says he wants the State Department’s inspector general to investigate whether Clinton violated federal law or policy.

Clinton is a likely Democratic presidential candidate. She used a private email account and server during her tenure at State.

(AP)