[This research study] will show that the cultural and religious traditions of Islam have resulted in most mosque-attending Muslim-Americans being social conservatives and, as a result, report having voted for Bush in 2000. It will also show that increasingly negative perceptions of the manner in which the United States war in Iraq has affected Muslims living American led many to switch loyalties and cast their ballots for Kerry in 2004.
By the time 2007 rolled around, American Muslims were 63% Democrat and only 11% Republican. (See here for data.)
This is interesting because rarely does a single demographic group change voting behavior or partisan identity so quickly.