Both Barisan Nasional (BN) and the opposition Pan-Malaysian Islamic Party (PAS) party have attempted to deliver political messages using mosques in the states they govern. All civil servants must attend government-approved religion classes. BN has banned opposition-affiliated imams from mosques, enforced restrictions on sermons, replaced opposition sympathetic mosque leaders and governing committees, and closed down unauthorised mosques affiliated with the opposition. The state government of Selangor in August 2005 withheld visas from foreign imams to try to increase the number of local imams. PAS, which controls the state of Kelantan restricts imams affiliated with BN from their mosques. It is thought that support for a moderate Islam led to the 2004 election victory of BN over PAS in the state of Terengganu. Both parties became more Islamic in the 1980s and 1990s to try to obtain more of the Malay vote. Political problems are often portrayed as religious issues.