DOVER, New Hampshire — The Democratic presidential race in New Hampshire appears to be changing too quickly for the polls to keep up. The stories that hit the news on Sunday focusing on Joe Biden’s difficulties might actually have understated the former vice president’s problems. After all, they were based in part on surveys that measured voter opinion between Feb. 4-7 or Feb. 4-8. In a situation like this, that’s a long time ago.

“You think Biden is losing support by the hour?” I asked an experienced New Hampshire politico as he arrived to check out the Pete Buttigieg rally here in the southeastern part of the state Sunday afternoon.