A new internal poll released by the Giannoulias campaign shows their candidate leading Republican Mark Kirk by four points.

The survey was conducted for the campaign by Democratic pollsters Greenberg Quinlan Rosner from February 9-14.  It sampled 600 voters and has a margin of error of +/- four points.  Here are the toplines:

Giannoulias: 49%
Kirk: 45%

For comparison's sake, a Rasmussen poll released on February 4 gave Kirk a six-point lead, while a Public Policy Polling survey from January 28 put Giannoulias ahead by eight.

Read the full polling memo below:

UPDATE: Greg Hinz has more from the Giannoulias camp.