The Unexpected Durability of Biden, Sanders

DES MOINES, Iowa (AP) – When Sen. Kamala Harris’ advisers assessed the Democratic primary field early in her campaign, they viewed Joe Biden as headed for an inevitable collapse and Bernie Sanders as unlikely to recapture the magic of his 2016 campaign.
A year later, Harris is out of the race, and Biden and Sanders are front-runners for the Democratic nomination. Both have overcome speed bumps in their campaigns, including a heart attack for Sanders, refined the rationales for their candidacy, and maintained the support of key Democratic constituencies – black voters for Biden and younger…