 In the wake of President Biden's poor debate performance in June, an AP-NORC Center for Public Affairs research poll shows some mixed results about Vice President Kamala Harris becoming president. Correspondent Donna Warder reports. The survey found that about 6 in 10 Democrats believe Vice President Kamala Harris would do a good job as president. About 2 in 10 Democrats don't believe she would. And another 2 in 10 say they don't know enough to say.