About 30 million people have already voted in 34 states and the District of Columbia, either by mail or in person. No votes will be counted until Tuesday but some key states are releasing the party affiliation of those who vote early.

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Colorado

Votes: 1.6 million

Democrats: 35 percent

Republicans: 37 percent

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Florida

Votes: 4.3 million

Democrats: 43 percent

Republicans: 40 percent

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Iowa

Votes: 614,000

Democrats: 43 percent

Republicans: 32 percent

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Nevada

Votes: 702,000

Democrats: 44 percent

Republicans: 37 percent

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North Carolina

Votes: 2.7 million

Democrats: 48 percent

Republicans: 32 percent

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Ohio

Votes: 1.6 million

Democrats: 29 percent

Republicans: 23 percent

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Sources: The Associated Press, state elections agencies and the United States Elections Project at George Mason University.

Note: Party affiliation in Ohio is based on the last primary in which a voter participated.

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Associated Press Senior Elections Research Coordinator Cliff Maceda contributed to this report.

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Follow Stephen Ohlemacher on Twitter: http://twitter.com/stephenatap