Everyone, breathe calmly
Korea has five-year single-term presidential limits. When that guy committed suicide he was already out of politics. So ... did the guy who was already elected have anything to do with killing off a previous president? That would be pure conjecture. It's not like the new guy had to worry about re-election chances (since you can't run for re-election). Similarly, President Park will be gone as of February 2018, which is just over 1 year from now. Some people want to remove her early, but what difference would it really make?
And ... being influenced by a religious type, who's mixed up in iffy financial practices.
Say hello to America. The
only reason we're hearing about this is because this Choi woman's religion isn't a mainstream one in Korea, thus the Korean media is pushing the story. It's like if a prominent Muslim cleric was backing a candidate. It would be big news in USA, not so big news in Saudi Arabia.
This is something you need to be aware of when looking at another countries news, the issue framing might be completely different for things which are not really any different. e.g. teen suicide rates in Japan. We hear all about it because the Japanese media is all over this, thus western journalists pick this up for pithy stories about "what's to be done with the Japanese suicide rate". But rates in the USA are rising too, and you hardly ever hear about that. There's not a huge difference in the suicide rates for under 20's in both countries. When does anyone in the USA give enough of a fuck about that to write a news report about it?
I looked at the figures, Japan's suicide rate is higher, but only if you look at older people. It spikes up compared to USA in the college-aged years, not in the highschool years, probably due to how competitive it is to get a job. But Japanese media is fixated on "teen suicides" not "college student suicides" because "teens" sells more panic. You should never take on faith how the media of a particular country frames an issue.