The Framers assumed that under the electoral college system, most presidential elections would be decided in the House. Why did this not turn out to be the case? A) Because the first Supreme Court ruled unconstitutional the electoral college system of selecting a president B) Because political parties ended up playing a major role in producing nationwide support for a slate of national candidates C) Because the Supreme Court narrowly interpreted the powers of the legislative branch D) Because the Senate quickly usurped the delegate powers of the House

When the Electoral College was founded, it was created as more of a safeguard—“just in case”—to help guide decision-making when electing a president. This was, however, before the advent of the two-party system, and the prevailing belief was that there would be many people vying for the position of president each election cycle.
However, the two-party system has pared down the number of individuals running for the presidency, and therefore it has simplified the vote. Because of this, while the Framers of the Constitution initially believed that Congress would have to decide most elections, the votes were simplified, and the Electoral College became a mainstay, expediting the election every year. Therefore, the answer is B) because political parties ended up playing a major role in producing nationwide support for a slate of national candidates.