Democratic U.S. Sen. Bill Nelson holds a 4-point lead over Republican Gov. Rick Scott in a statewide poll conducted by Marist College for NBC News.

The Marist survey shows Nelson at 49 percent and Scott at 45 percent with 5 percent undecided and 1 percent for other. It's yet another poll showing a very small pool of undecided voters in this closely-watched race.

Marist surveyed 1,083 adults from June 17-21. The poll has a margin of error of 3.7 percentage points.