Joe Biden, speaking to donors in Denver, takes digs at Sanders and Bloomberg

Former Vice President Joe Biden is dropping in the polls in the Democratic presidential race while a self-described Democratic socialist is on the rise. In the still-crowded race, he’s been losing support to other moderates. Speaking to donors in Denver Monday night, Biden never referred to those polls or his declining position after disappointing finishes in Iowa and New Hampshire this month. But it was clear he was seeking to regain lost ground. He took aim at U.S. Sen. Bernie Sanders, the emerging front-runner, by criticizing him for not adequately explaining how he’d pay for his Medicare for All plan. Biden has offered more modest health care proposals, including a public...