Thomson ReutersFebruary 14, 2013 13:45
* Co-ruling party lodges court challenge against incumbent
* Vujanovic elected twice, but only once since independence
* Row could destabilise coalition - analyst
By Petar Komnenic
PODGORICA, Feb 14 (Reuters) - A junior partner in Montenegro's governing coalition lodged a court challenge on Thursday against President Filip Vujanovic's bid for re-election, exposing a rift that could threaten the ruling alliance.