The governor is still leading the pack of GOP contenders in his home state, but his margins have narrowed, according to a poll. Wisconsin Gov. Scott Walker is still leading the pack of Republican presidential contenders in his home state, but his margins have narrowed as Ben Carson and Donald Trump see growing support, according to a Marquette Law School poll released Thursday. The poll shows Walker ahead with 25 percent, followed by Carson at 13 percent and Trump with 9 percent. Walker’s numbers have dropped from 40 percent in April — when he had not officially entered the race....