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Read the NBC News guide to Iowa and New Hampshire

NBC's Domenico Montanaro breaks down how the caucus process works and just how much Iowa matters.

Prepare for Jan. 3's Iowa caucuses and the Jan. 10 New Hampshire primary with NBC News' definitive guide of the history, tradition and statistics surrounding these nominating contests.

The guide below (view as a .pdf here) contains a complete rundown of this year's primary calendar, and a look back at the political events to have govern the past year. It also breaks down the way delegates are apportioned to candidates throughout the GOP primary.

It dives even further into the history and demographics guiding the Iowa and New Hampshire contests, and includes data from the 2008 caucuses and primaries, too.

NBC News guide to Iowa and N.H. nominating contests