The 2016 U.S. presidential election is just around the corner. Both candidates have been making their final campaign stops to gather more votes, particularly in swing states.

On Sunday, Democrat Hillary Clinton and Republican Donald Trump hit major battleground states, including Ohio, Pennsylvania and New Hampshire. Clinton is targeting African-Americans and other minority groups, while Trump is expanding his reach to historically Democratic states.

Under the U.S. election system, if one candidate wins a state, that candidate takes all the electoral votes for that state. A candidate needs to reach 270 electoral votes, about half of the total 538, to become president.