Sen. Dean Heller (R-Nev.) is narrowly leading Rep. Shelley Berkley (D-Nev.) in their Senate race, according to a new poll conducted by GOP pollster Glen Bolger for the Retail Association of Nevada.

According to the poll, Heller leads Berkley by 47 percent to 44 percent.

The race has been close from the start, according to polls. Heller's lead has narrowed slightly from a 48 percent to 42 percent edge he had over Berkley in the last poll done by the group, back in October.

Democrats are hopeful they can pick up the seat and have made it one of their two top targets, along with Massachusetts, of sitting GOP senators.

The poll numbers were first obtained by the Las Vegas Sun's Jon Ralston. The poll of 500 Nevada voters was conducted last week and had a margin of error of 4.4 percent.