Malaysia’s Umno has been drawn deeper into a royal row in Negeri Sembilan, after the president of the dominant Malay nationalist party denied attending a meeting reportedly linked to a bid to remove the state’s ruler. The controversy has put the new Umno-led state government under pressure barely six weeks after taking office, reviving the same royal crisis that helped bring down its predecessor and force a snap election in August. The episode is particularly sensitive for Umno, which has long...