US President Donald Trump and his Democratic challenger Joe Biden have been locking horns for the past few months as they battle it out to win the US Presidential elections to be held on November 3. But the key to the White House lies in winning over the electoral college. What exactly is the electoral college, how is it different from the popular vote and why is it so crucial to ensure a victory? Zakka Jacob explains. #DonaldTrump #JoeBiden #USElections2020