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.
But most observers expect a close election and the findings of the survey is consistent with that line of thought.
A Wenzel Strategies poll conducted in late April for the pro-Mourdock Citizens United Political Victory Fund showed Mourdock leading Lugar 44 percent to 39 percent.
The Magellan Strategies poll of 400 likely Indiana Republican primary voters was conducted for the Lunch Pail Republicans on May 1 and carries a margin of error of +/- 4.9 percentage points.