Nafarroa-Bai (Navarre-Yes) is actuallya coalition of Basque Nationalist parties (PNV, EA, Aralar: see my diary on the basque political spectrum). Running together is the only way they could get one seat from Navarra in the national parliament. I would say their position on the status of Navarra can be at best ambiguous. Coming explicitly for Navarra being incorporated to the basque country is political suicide for them, though, and that position is taken by Batasuna.

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman