The signs, which were just rectangles of slightly differing tartan patterns with no identifying information, were apparently the work of Corey Troup, a Republican candidate who was proud of his Scottish ancestry. Troup lost to Margaret Craven by a 50-point margin.
Sun Journal editor Anthony Ronzio provided some analysis of the effort:
[...]campaign signs are to, you know, campaign. Or, at least, get your name out there. Troup's mysterious tartans - though maybe a clever inside joke - were a failure on both fronts.
Then again, so were most Republican strategies in this election. Scott Lansley, head of the Androscoggin County Republican Committee, described the results as "getting our asses kicked."
The whimsical stupidity of this effort aside, it presents an interesting case of the reach of Maine political advertising laws. Most campaign communications must carry a statement identifying the group or individual responsible for their creation and distribution. I guess Troup was able to get away with not identifying his handiwork because the mysterious signs did not "clearly identify" a candidate.