Trust me they've tried all kinds of other schemes and tricks before this one.
Here's how from a gay Jew from the influential AEU
>https://www.aei.org/op-eds/the-broad-coalition-uniting-to-try-to-take-down-viktor-orban/
"The tide might be turning, however. In the 2022 parliamentary election, Hungary’s six leading opposition parties are planning to agree on a common manifesto, to draw a single electoral list—running one joint candidate to oppose Fidesz in each district, and to present a shared candidate for prime minister."
With the backing of the Biden admin. This is how Biden made it close enough to rig it against Bernie. All the other candidates dropped out at the same time and announced support for Biden.
Biden's so unlikable that it wasn't enough, they still had to fudge the numbers and a few other tricks.