If a third party ever gained any political clout, it would do whatever is necessary to retain and expand that clout just like the other parties do. Rather than solving a problem, it would further complicate things and wind up turning more people off to the political process, IMO.
The Democrats, who don't seem to care about the Constitution, would benefit by a third party claiming to "protect the constitution" because it would split the Republican/Conservative vote.
Richard W.