If her email practices foiled public-records requests or compromised classified information, those are “valid questions,” Mr. Sanders said. [... On the issue of Mrs. Clinton’s emails, Mr. Sanders didn’t say he regretted his debate remarks. “You get 12 seconds to say these things,” he said of the debate setting. “There’s an investigation going on right now. I did not say, ‘End the investigation.’ That’s silly.…Let the investigation proceed unimpeded.”

In what the media is casting as a major shift, Bernie Sanders said on Wednesday that he supports ongoing investigation into Hillary Clinton's email practices as secretary of state:These comments are something of a shift, but the media is also probably overselling them. It's not a gaping contradiction to say that American voters are sick of the media hype over Clinton's emails and the degree to which that hype has crowded out substantive discussion of policy and also say that a nonpartisan investigation (i.e. not the House Benghazi Committee) is reasonable and valid.

Time will tell if this marks a shift in how directly and on what topics Sanders will criticize Clinton—it's getting to be campaign prime time when candidates do take each other on more directly, and with Clinton's national poll numbers going back above 50 percent, Sanders has added incentive to be harsher. I still wouldn't look for him to start sounding like Donald Trump or even Jeb Bush in his criticisms of his competitor.