“It’s a logical assumption that the secretary of state is talking about highly confidential classified information. How can she ensure that that information wasn’t compromised?” Walker told The Weekly Standard in an interview Sunday after an event with supporters in Des Moines, Iowa. “I think that’s the bigger issue—is the audacity to think that someone would put their personal interest above classified, confidential, highly sensitive information that’s not only important to her but to the United States of America. I think [it] is an outrage that Democrats as well as Republicans should be concerned about.”

The likely 2016 presidential contender also rejected claims that he is being hypocritical on the issue, given his use of a private email network while he was Milwaukee County executive, noting that it had been investigated and nothing much came of it.

“I think arguably the craziest news story out of it is that someone who appears to have been an intern years ago wrote a draft letter in response to a request to put up a menorah candle for Hanukkah and at the end said Molotov instead of Mazel Tov,” he said. “If that’s the craziest thing you can look at, most people realize that really wasn’t much of anything.”