Republican presidential candidate Herman Cain said Saturday that part of his immigration policy would be to build an electrified fence on the country’s border with Mexico that could kill people trying to enter the country illegally... Mr. Cain added that he also would consider using military troops “with real guns and real bullets” on the border to stop illegal immigration. The remarks were among the most pointed yet by Mr. Cain about illegal immigration, and they come as he is enjoying a surge in national political polls on the back of his victory in a recent Florida straw poll.. It...