state (class)              vacator                              reason for vacancy                  subsequent date of successors installation
0     arizona (1)               vacant  new state winners were elected march 27 , 1912         henry f ashurst (d)                  april 2 , 1912
1     arizona (3)               vacant  new state winners were elected march 27 , 1912          marcus a smith (d)                  april 2 , 1912
2  new mexico (1)               vacant  new state winners were elected march 27 , 1912         thomas b catron (r)                  april 2 , 1912
3  new mexico (2)               vacant  new state winners were elected march 27 , 1912           albert b fall (r)                  april 2 , 1912
4    illinois (3)  william lorimer (r)      senate invalidated election july 13 , 1912  vacant until next congress      vacant until next congress

Table as JSON:
{"state (class)":{"0":"arizona (1)","1":"arizona (3)","2":"new mexico (1)","3":"new mexico (2)","4":"illinois (3)"},"vacator":{"0":"vacant","1":"vacant","2":"vacant","3":"vacant","4":"william lorimer (r)"},"reason for vacancy":{"0":"new state winners were elected march 27 , 1912","1":"new state winners were elected march 27 , 1912","2":"new state winners were elected march 27 , 1912","3":"new state winners were elected march 27 , 1912","4":"senate invalidated election july 13 , 1912"},"subsequent":{"0":"henry f ashurst (d)","1":"marcus a smith (d)","2":"thomas b catron (r)","3":"albert b fall (r)","4":"vacant until next congress"},"date of successors installation":{"0":"april 2 , 1912","1":"april 2 , 1912","2":"april 2 , 1912","3":"april 2 , 1912","4":"vacant until next congress"}}