state (class)                 vacator                    reason for change              successor date of successors formal installation
0       tennessee (2)      estes kefauver (d)                died august 10 , 1963  herbert s walters (d)                       august 20 , 1963
1      california (1)         clair engle (d)                  died july 30 , 1964    pierre salinger (d)                        august 4 , 1964
2  south carolina (2)      strom thurmond (d)            changed political parties     strom thurmond (r)                    september 16 , 1964
3      new mexico (1)      edwin l mechem (r)           resigned november 3 , 1964     joseph montoya (d)                      november 4 , 1964
4        oklahoma (2)  j howard edmondson (d)  successor elected november 3 , 1964      fred r harris (d)                      november 4 , 1964
5       tennessee (2)   herbert s walters (d)  successor elected november 3 , 1964          ross bass (d)                      november 4 , 1964

Table as JSON:
{"state (class)":{"0":"tennessee (2)","1":"california (1)","2":"south carolina (2)","3":"new mexico (1)","4":"oklahoma (2)","5":"tennessee (2)"},"vacator":{"0":"estes kefauver (d)","1":"clair engle (d)","2":"strom thurmond (d)","3":"edwin l mechem (r)","4":"j howard edmondson (d)","5":"herbert s walters (d)"},"reason for change":{"0":"died august 10 , 1963","1":"died july 30 , 1964","2":"changed political parties","3":"resigned november 3 , 1964","4":"successor elected november 3 , 1964","5":"successor elected november 3 , 1964"},"successor":{"0":"herbert s walters (d)","1":"pierre salinger (d)","2":"strom thurmond (r)","3":"joseph montoya (d)","4":"fred r harris (d)","5":"ross bass (d)"},"date of successors formal installation":{"0":"august 20 , 1963","1":"august 4 , 1964","2":"september 16 , 1964","3":"november 4 , 1964","4":"november 4 , 1964","5":"november 4 , 1964"}}