Joe Biden Builds Lead, Kamala Harris Sinks in New CNN Poll

Sen. Kamala Harris (D-Calif.) speaks to reporters after announcing her candidacy for president of the United States, at Howard University, her alma mater, in Washington on Jan. 21, 2019. Harris is the first African American woman to announce a run for the White House in 2020. Al Drago/Getty Images

A new CNN poll released Aug. 20 about the Democratic presidential primary campaign showed support for Sen. Kamala Harris (D-Calif.) plummet while former Vice President Joe Biden built on his lead, jumping to nearly twice the support of second-place Sen. Bernie Sanders (I-Vt.).

Support for Harris in the poll (pdf) dropped 12 percentage points, leaving her at 5 percent support.