Bug report: I managed to get Braun elected President, but then had a march on Berlin happen and held snap elections. The NSDAP+DNVP won a majority, but I was still able to click "no clear majority" and hold new elections again and again.
Also bug report: I managed to get the people's party card showing up, but chose the option for not becoming a people's party. Later on I played campaigning and it said the SPD was still a people's party anyway, then got the achievement for becoming a people's party.
Viewing post in Social Democracy: An Alternate History comments
On easy: Have Pfulf as an advisor, use her building a people's party ability, choose "No, we will always be a party of the working class.", and then campaign with the middle class/rural workers. Still gives the text "As a people's party, we have an easier time increasing support among the middle class than before.".