This was one of the longest primary seasons on record, and one of the least predictable.
The Republican frontrunner, at the time the nomination contests began, former New York mayor Rudy Giuliani, made an early exit.
The Democratic frontrunners were still battling it out in early June, a full five months after the Iowa caucuses.
How much do you remember?
Clinton wins Kentucky primary ...
Pennsylvania campaign gains pace ... />
(BBC)
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