I’ll tell you what I told the previous commenter: They were not all runner-ups, that’s misinformation. The assassinations were not presidential candidates. They were local politicians, running for mayoral or council seats.
Which is also disgusting, of course, but no, the cartels did not kill off all her competition to get her into office.
I had to look up the meaning and now I can only imagine the confusion this person must have felt, before he figured it out, lol.