Every day brings another presidential preference poll. Clinton leads the GOP field in North Carolina! Walker has the edge over the other Republicans in Iowa! Jeb Bush is has a slight margin over Hillary Clinton in Virginia! So are these polls remotely relevant to who will take the oath of office in January, 2017? They are not. I will add one caveat, courtesy of the University of Virginia’s Larry Sabato. Early polls, he wrote here at usnews.com last month, “open or close many donors' wallets. When the polls look good for a candidate, the war chest fills. The early polls als...