Wow. Over here, we thankfully have more than two parties, so if one party attempts such a thing, the 5+ other parties will denounce that in unison and it becomes pretty clear that it’s not just one of the usual quarrels.
It also means, you pretty much always have coalitions ruling the country, so not even the ruling parties have a shared interest in pushing anti-democratic horseshit. Many of the smaller parties would in fact really like to see more voters reached, because those are wildcards and not just voting for always the same big parties.