Dogged by federal and state criminal investigations, Gov. Bob McDonnell's job approval has sunk to its lowest point yet in Quinnipiac University's new poll of Virginia voters.

Only 46 percent approved of McDonnell's performance as governor while 37 percent disapproved in the poll released Wednesday morning. That contrasts with an October 2011 poll in which two out of every three respondents approved.

Asked whether McDonnell was honest and trustworthy, 44 percent said yes and 36 percent said no. Twenty-seven percent felt McDonnell was involved in serious wrongdoing, 5 percent felt it was not serious, and 16 percent thought he was not involved. But 49 percent hadn't heard enough to comment.

The Connecticut-based university called 1,030 registered Virginia voters. The poll's margin of sampling error is plus-or-minus 3.1 percentage points.