Plucky? Or pinheaded?
Several [tea party] groups already are setting their sights on 2014 congressional races, in which they plan to promote their preferred candidates and hope to weed out Republicans they consider insufficiently conservative....
"This was a very difficult year," said [the] founder of the Virginia Federation of Tea Party Patriots. "But in many ways, we are stronger than ever."
There was no elaboration on that "stronger than ever" part.
I'll go with pinheaded.