RICHMOND, Va. (AP) — Fanaticism is fueling conservative voters who could threaten Democrat Terry McAuliffe’s political chances, former President Bill Clinton warned Sunday as he joined his longtime buddy’s campaign for Virginia governor.With little more than a week before Nov. 5’s Election Day, McAuliffe and Republican Ken Cuccinelli each have sought to energize their strongest supporters, by inspiration or fear. McAuliffe has opened a lead in polling and is heavily outspending Cuccinelli on television ads, but turnout is expected to be low and the result could be decided by a few thousand votes.“Political extremism does have one redeeming virtue in terms of pure politics,” Clinton said here at a packed high school auditorium.“If you can get somebody into a fanatic frame of mind,” Clinton said, then they will vote because they are convinced the deck is stacked against them.It was a shift in roles. For decades, it has been McAuliffe championing the personal and political futures of Bill Clinton and, later, his wife, Hillary Rodham Clinton.