Gallup Finds That A Record Percentage of Americans Identify as Independents

Forty-two percent of Americans, on average, identified as political independents in 2013, the highest Gallup has measured since it began conducting interviews by telephone 25 years ago. Meanwhile, Republican identification fell to 25%, the lowest over that time span. At 31%, Democratic identification is unchanged from the last four years but down from 36% in 2008...

The increased independence adds a greater level of unpredictability to this year's congressional midterm elections. Because U.S. voters are less anchored to the parties than ever before, it's not clear what kind of appeals may be most effective to winning votes. But with Americans increasingly eschewing party labels for themselves, candidates who are less closely aligned to their party or its prevailing doctrine may benefit.

Does anyone see in this study whether they surveyed "voters?" or just "Americans?"