The Latest: Democratic 2016 candidates meet for 2nd debate

DES MOINES, Iowa (AP) — The Democratic presidential candidates are debating for the second time in the 2016 nomination contest, this time in Des Moines. The latest developments (all times local): ___ 9:45 p.m. Bernie Sanders says single-payer health insurance is the only way to go. But Hillary Rodham Clinton argues that she once thought this would happen and that "revolution never came." The Vermont senator and former secretary of state are clashing over health care in the second Democratic debate. Sanders says changing to a single-payer system would take time but that it can happen "when millions of people stand up and agree to take on the insurance companies and the drug companies."...