The presidential campaign formally opens when a candidate is officially nominated at the National convention. thereafter, the candidate can call out press conferences, conventions to call out his platforms for everyone to know his intentions about the country. The republic allows all legible voters to vote their own cadidate of choice.
WW1 left Germany in a very poor state economically, providing an excellent setting for Nazism, specifically the Fascist ideaology's blaming of the ethnic peoples of Germany for Germany's downfall. The bitter sense of resentment at Germany's misery was very easily turned around into German nationalism, too, which provided the drive behind the movement.
Roads were built to connect the new territory to the rest of the empire.