Hillary was in Iowa this weekend, and made a little rhetorical boo-boo.
Everyone cracks up in the audience. To me, it read as an accidental Bill reference. She didn't mean it that way, but it looked like she realized it shortly after she said it. Actually, I thought it looked like one of her more genuine moments, ever. She's clearly slightly embarrassed, smiling broadly, sheepishly. If she has trouble being warm and endearing, she should make Bill Clinton jokes more often.
Since then, she's claimed she was being serious, but also claimed she was joking, so who knows? She's a Clinton. The world may never know.