Some presidential primary voters in Kentucky and Arkansas are taking a swipe at President Barack Obama, denying the incumbent nearly 4 out of every 10 votes cast on the Democratic side.

In Kentucky's closed primary, about 42 percent of registered Democrats who voted selected "uncommitted."

In Arkansas' open primary, voters could select a ballot for either party. Early returns showed a Tennessee attorney, John Wolfe, drawing about 40 percent on the Democratic side.

The results in either state will not hamper Obama's effort to gain the party's nomination for a second term. Still, it's a bit embarrassing for the Democratic Party and highlights Obama's political weakness in Southern states.

Two weeks ago, a federal inmate in Texas earned 41 percent of the vote in West Virginia's Democratic primary.