While Prince Raijun had earned the political support of a solid chunk of the Martial Union, he did not own that power. That power had more of an ownership over him than he did over it.
'Your status as a prince does not hold nearly as much weight amongst Martial Artists of the Martial Union as it does elsewhere.' Rui mused. 'The only reason they're supporting you is because only those with Royal blood can ascend the throne.'
In other words, Prince Raijun was not a leader so much as a front. While he had undoubtedly displayed political acumen qualities in lobbying for as many Martial Artists to join his faction. What he was essentially doing was selling himself as an opportunity for the Martial Union to gain the throne.
In other words, for all matters not relating to the throne, the Martial Union did not care about Prince Raijun.