Joe Biden is well out in front in a new national CNN poll. His 29% equals the combined total of Bernie Sanders and Elizabeth Warren. Pete Buttigieg and Kamala Harris are tied for fourth at 5%. These results are in line with the overall national polling averages for recent polls.
Comparing these results to the prior CNN poll - taken just after the first debate - shows that the bump Harris received from her performance has evaporated, with Biden regaining much of the share he lost. The support for Warren and Sanders is essentially unchanged.
The CNN poll brought good news for Julian Castro, making him the 10th qualifier for the next Democratic debate. That will be held September 12th and 13th in Houston, broadcast by ABC and Univision.
To make the September stage, candidates must get at least 2% in four qualifying polls and have received a donation from a minimum of 130,000 unique donors. The deadline for qualifying is August 28, with a couple additions still possible. Tom Steyer is one poll short, while Tulsi Gabbard needs two more. Both have met the fundraising requirement. No other candidate seems likely to make the cut.