Gov. Tim Walz of Minnesota on Tuesday called for abolishing the Electoral College as a means of electing American presidents, reiterating a position he has articulated in the past while he and Vice President Kamala Harris are in the heat of a campaign for the White House. Twice during campaign fund-raisers on the West Coast, Mr. Walz said he would prefer that presidential candidates did not have to focus on a few political battlegrounds and could instead focus on winning votes from across...