On Wednesday morning, CNN published a new poll evaluating the state of the Democratic presidential primary fight. Former vice president Joe Biden had surged back into a healthy lead, enjoying a double-digit margin over Sens. Elizabeth Warren (D-Mass.) and Bernie Sanders (I-Vt.), who are jockeying for second. That was important news for Biden’s campaign, which had seemed to stall in the polls as Warren surged.
But then Thursday morning dawned. CONT.
Philip Bump , Washington Post
Recent polls: Democratic presidential race