Which was Vice President Kamala Harris not successful at during the 2020 Presidential campaign?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q30', 'id': 0, 'label': 'United States of America'}, {'type': 'INTERNAL', 'name_': 'Q11699', 'id': 1, 'label': 'Vice President of the United States'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q699872', 'id': 2, 'label': '2016 United States presidential election'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q10853588', 'id': 3, 'label': 'Kamala Harris'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q22923830', 'id': 4, 'label': '2020 United States presidential election'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P1001', 'source': 1, 'target': 0, 'label': 'applies to jurisdiction'}, {'name_': 'P1308', 'source': 1, 'target': 3, 'label': 'officeholder'}, {'name_': 'P17', 'source': 2, 'target': 0, 'label': 'country'}, {'name_': 'P541', 'source': 2, 'target': 1, 'label': 'office contested'}, {'name_': 'P17', 'source': 4, 'target': 0, 'label': 'country'}, {'name_': 'P541', 'source': 4, 'target': 1, 'label': 'office contested'}, {'name_': 'P726', 'source': 4, 'target': 3, 'label': 'candidate'}]}