Hillary Clinton says she regrets using private email
Hillary Clinton has said she wished she had made a "different choice" and not used a private email account while serving as US secretary of state, the BBC reported.
"I'm sorry this has been confusing," she told the cable news channel MSNBC.
Her use of private email has generated a barrage of criticism as Mrs Clinton runs for the Democratic presidential nomination for the 2016 election.
Critics say that her set-up was not secure, contrary to government policy, and meant to shield her from oversight.
Political analysts - including fellow Democrats - have said the Clinton campaign has stumbled in its response to the controversy and Mrs Clinton had not seemed contrite - at times even making jokes about the email issue.
A more sombre Mrs Clinton took full responsibility in Friday's interview, saying she didn't "stop and think" about how use of a private email account would be perceived.
It has been a major issue in the presidential race. Polls show an increasing number of voters view her as "untrustworthy" due in part to the questions surrounding her email use.