The FBI said on Tuesday it has turned over to the U.S. Congress a number of documents related to its investigation of Hillary Clinton¡¯s use of a private email server while she was secretary of state.

The Democratic presidential nominee has for over a year been dogged by questions about her use of a private email account while she was the nation¡¯s top diplomat.

Republicans have repeatedly hammered Clinton over the issue, helping to drive consistent opinion poll results showing that some U.S. voters doubt her trustworthiness.