American elections have come a long way since Dwight D. Eisenhower bought the first television advertising spots ever used for political campaigning in history, employing 20 and 60-second spots to convey his message to the American voters.
Before technology, two-way campaigning was difficult.
Politicians could only be in one place at a time, often the battles took place in the newspapers -- and the 'two-way' aspect of campaigning, especially the collection of donations, was difficult to maintain on a consistent basis.