A quick update from Maine, where absentee ballot levels are roughly equal to those of 2004. The graph on the left shows the number of ballots returned by party affiliation, and indicates a Democratic trend.
Democrats have the edge in voter registration in the state, however, so the graph on the right shows the same data as a percentage of each party’s active registered voters. This evens things out a little—around 23% of registered Democrats have voted, compared to 18% of Republicans. The low percentage of unaffiliated voters (12%) is interesting, but broadly in line with past experience: early voters tend to be more committed partisans.