The Lone Potential Democratic Contender Critiquing Clinton's Email Scandal

Most potential 2016 Democratic presidential candidates have been slow to go after the party's presumed frontrunner Hillary Clinton on the missing email scandal. Possible candidates offered only a tepid response, while another likely Democratic hopeful even said nobody cares.

But former Maryland Gov. Martin O’Malley has come the closest to criticizing the former secretary of state.

"In my 15 years of executive service, I mean, we took openness and transparency in the operations of our government to a very high level,” O’Malley told Fox News. “And I think she is capable of answering those questions.”

Clinton, expected to officially announce her candidacy next month, used her own personal server and private email address when she conducted government business while serving as secretary of state.

O’Malley’s jab comes as a Quinnipiac University Poll finds Clinton slipping in her lead over potential Republican opponents in two key states, Florida and Pennsylvania.

Vermont Sen. Bernie Sanders, an independent who caucuses with Democrats and has expressed interest in running in the Democratic presidential primary, said neither he nor the public is concerned with Clinton’s missing emails.

"What Hillary Clinton did with her email is, frankly, not one of the great issues I face," Sanders said.

"There is great deal of interest on this subject from people in the media here on Capitol Hill. Not a whole lot of interest from people back home," Sanders went on to say. “The people back home are precisely interested in what we're talking about — how do you create a million jobs, how do you make college affordable, how do you make health care affordable?"

Former Virginia Sen. Jim Webb avoided the subject earlier this month, other than to say he’ll let the public decide. NBC News asked Webb if Clinton should have been more transparent at her United Nations press conference where she explained the email flap.

“It’s a good time for the air to be cleared, it’s a good opportunity for her to come forward,” Webb said.

But asked for an opinion on the matter, Webb told reporters, “That’s between her and you all. I think the best thing is to listen to her views and people will make conclusions in a better way than I can.”

Massachusetts Sen. Elizabeth Warren has repeatedly said she will not run for president in 2016 despite the urging form the most progressive elements of her party.

While Warren neither criticized nor defended Clinton over the emails, she did say she was surprised, according to the New York Post reported.

Asked in an interview, “were you surprised,” Warren responded, “Yes ... I think she should make them public, which is what I believe she is doing.”