CLEVELAND, Ohio -- Joe Biden now holds a double-digit lead over his fellow Democrats running for president, a new CNN poll shows.

The poll, conducted by independent research firm SSRS from August 15-18, shows the former vice president at 29%. The 7-point increase over the last poll shows Biden seemingly unaffected by a series of gaffes this month which included misidentifying the sites of two mass shootings and saying “poor kids are just as bright and just as talented as white kids.”

Following Biden are Vermont Sen. Bernie Sanders and Massachusetts Sen. Elizabeth Warren, holding steady at 15% and 14%, respectively.

Biden’s bump comes mostly at the expense of California Sen. Kamala Harris, who dropped from 17% all the way down to 5% and into a fourth-place tie with South Bend Mayor Pete Buttitieg.

Former Texas congressman Beto O’Rourke, New Jersey Sen. Cory Booker, former Obama cabinet member Julian Castro and Hawaii congresswoman Tulsi Gabbard are the only other candidates above or at 2%. Despite a strong performance at the last debate, entrepreneur Andrew Yang remains at 1% for the fourth straight poll.

Ohio congressman Tim Ryan, who took some time off the campaign trail to deal with the aftermath of the Dayton shooting, is also at 1%.

Whether it’s Biden, Sanders, Warren or Harris to come out of the crowded field, each matches up favorably in a race against President Donald Trump, at least according to a Fox News poll. The survey, which caused the president to lash out at his favorite network Monday, showed the top four Democrats winning by margins ranging between 6 to 12 points.

Respondents of the CNN survey appear to agree, with 54% saying the Democratic nominee -- whoever it is -- has a “strong” chance of beating Trump.

In other primary news, Castro became the 10th candidate to qualify for the next debate as a result of the CNN poll. He’ll join Biden, Sanders, Warren, Harris, Buttigieg, Booker, O’Rourke, Yang and Minnesota Sen. Amy Klobuchar at the ABC debate in Houston on Sept. 12 and, if more candidates qualify, Sept. 13. Those additional candidates could include Gabbard, New York Sen. Kirsten Gillibrand and billionaire Tom Steyer, each of whom has already met one of the two qualifying criteria.