Former state Sen. Cal Cunningham has sliced into Secretary of State Elaine Marshall’s lead for the Democratic nomination, but voters are far from ready to make up their minds about who they want in the Senate.

A Public Policy Polling survey conducted March 12-15 found Marshall favored by 20 percent of those polled; Cunningham, 16 percent; and attorney Ken Lewis, 11 percent.

However, 47 percent were undecided.

The survey of 420 likely Democratic primary voters had a 4.8-point margin of error.

The winner of the primary will face Sen. Richard Burr (R) in November.