Not electoral rolls. More like a listing of residents. They could NOT have voted since only Canadian citizens could vote and they could not have been citizens since they had not been residents long enough to even apply for Canadian citizenship.
It shall be used if Cruz becomes Hillary’s opposite. They will tie him up so tight in left wing courts that people will forget his name. By the way I will vote for Cruz if he becomes the nominee. I am not happy with him as he throws bombs to get attention but he is highly intelligent and is infinitely better than the foul and corrupt Clinton’s.