In the race to 270 electoral votes, California and Texas are the biggest prizes, but all eyes are on seven battleground states that could decide the presidency. The state with the most electoral votes has 54 votes while the states with the least votes have three votes each.

The Electoral College is the unique American system of electing presidents. It is different from the popular vote, and it has an outsize impact on how candidates run and win campaigns. Republicans Trump and Bush lost the popular vote during their presidential runs but won the Electoral College to claim the nation's top office.