In Secret Hitler, what happens when exactly 50% of players vote "Ja!"
The Kickstarter page says the following (emphasis mine):


  Each round, the President selects a Chancellor. The whole table votes "Ja!" or "Nein!" on their ticket; if a majority of players vote “Ja!,” the elected President and Chancellor take the following actions to pass a new policy:


Since 50% is not a majority, the election failed.