At least the poll shows Mittmentum.
Their previous poll was 52-44 Obama.
...No Republican nominee has won without winning Virginia since 1924. It is possible for Mitt to win without Virginia, but he would have to win every other swing state (including Colorado, Florida, North Carolina, and Ohio) and every near-swing state (Iowa, Nevada, New Hampshire, and Wisconsin)
R-leaning pollsters have the state really close.
A week and a half before the election and being down 4 is about as bad as being down 10 six months before the election. Maybe worse.