Ten of the 50 U.S. states have been the most crucial in the U.S. presidential elections. It is because these 10 states have voted for both Republican and Democratic candidates in the past four elections.

The electoral college which elects the U.S. president consists of 538 electors. A majority of 270 electoral votes is required to elect the President. This is also why these 10 states, which have a total of 116 electoral votes, become important in determining the outcome of the election.
States such as Florida (29 electoral votes), Ohio (18 electoral votes) and Virginia (13 electoral votes), with a higher number of electors than most other states, have voted twice for Democrats and twice for Republicans in the last four elections. Similarly states such as Nevada, Colorado and Iowa have also swung twice between the two parties.
The swing states could determine whether it's a Trump victory or another Clinton makes it to the White House.
Also Read
How The U.S. Elects Its Presidents: Bloomberg QuickTake
Does India Matter To The U.S. Presidential Candidates?
Essential Business Intelligence, Sharp Market Insights, Practical Personal Finance Advice, Daily Fuel, Gold and Silver Prices and Latest Stories — On NDTV Profit.