National Journal reports:
Sen. Richard Lugar and Indiana Treasurer Richard Mourdock are in a dead heat according to a poll released Wednesday that was conducted for the Lunch Pail Republicans, a pro-labor group that announced its support for Lugar on the same day.
Lugar leads Mourdock 44 percent to 42 percent, separation that is within the margin of error. Fourteen percent of respondents said they were undecided.
The live-caller poll was conducted entirely on Tuesday. One-day polls typically arouse a bit more skepticism than surveys conducted over the course of several days.