Republican state Treasurer Richard Mourdock has a lead in the Indiana Senate race, in a poll released Monday by Rasmussen.

Mourdock leads Democratic Rep. Joe Donnelly, 47 percent to 42 percent. The survey of 600 likely voters was conducted Oct. 10-11, and has a 4 percent margin of error.

The PollTracker Average shows Mourdock leading, 46.3 percent to 42 percent.