(CNN) Former Vice President Joe Biden's announcement of a bid for the Democratic presidential nomination earned him an 11-point polling bounce, leaving him head and shoulders above the rest of the Democratic candidates. Biden's surge in support solidifies his status as the front-runner in a race that now has 20 candidates in the Democratic field. But the order is shuffled: Harris holds the top slot, mentioned by 23% of potential Democratic voters. Only half (49%) of potential Democratic voters say they know at least a fair amount about his positions as a senator, half (51%) say they know very little. And the poll finds the potential Democratic electorate is generally happy with their choices.

Source: CNN April 30, 2019 10:04 UTC