http://www.swissinfo.org/sen/swissinfo.html?siteSect=143&sid=6034284&cKey=1124931935000BAGHDAD (Reuters) - Firebrand cleric Moqtada al-Sadr, whose fighters clashed with rival Shi'ite factions on Wednesday night, has again returned to centre stage in the new Iraq but this time the stakes are much higher.
As Shi'ite and Kurdish government leaders were set to push through a constitution Sadr fiercely opposes, his spokesman warned that his Mehdi Army militia could be quickly mobilised after fighting erupted with administration-linked Shi'ites.
Sadr, scion of a respected Shi'ite clerical dynasty who led two uprisings against U.S. troops last year, has set a pattern of lengthy periods of silence followed by dramatic entrances.
Clashes in the holy city of Najaf, in Baghdad and elsewhere could offer Sadr an opportunity to reassert himself at a time of uncertainty, a skill he has mastered since the fall of Saddam Hussein in 2003.
This week he reminded the U.S.-backed government how quickly he can stir passions when thousands of his supporters protested against the draft constitution, stepping up pressure on Iraqi leaders exhausted after weeks of wrangling over the charter.