CNN: "The incredible shrinking ... Bernie Sanders?"

Polls (yep, it's early, we know) show Sanders losing support, as others such as Joe Biden, Elizabeth Warren and Kamala Harris gain ground. A Monmouth University national poll released last week shows Sanders with the support of 15% of Democratic-leaning voters, a decline of 25% from March. A Monmouth poll of New Hampshire shows Biden with a 20-point lead over Sanders, roughly the same margin he beat Clinton by in the state in 2016.

In conversations recently with about a dozen voters who showed up at his events during his longest New Hampshire swing, it's clear that the kind of ride-or-die support Sanders had in 2016 has dissipated a bit. To some of his former supporters, he is just another candidate, the revolutionary front man who launched a thousand cover bands.

"He brought so much into the conversation, if he did nothing else," said Felice Burstein, 64, who voted for Sanders in 2016, and recently saw Cory Booker. "But I'm on the fence now, exploring. It's too early to tell. I worry that he's older and I'm not sure the country is ready for his ideas."