As they forge across the frozen expanses of Iowa some of them have icicles slowly sprouting on their eyebrows and beards, others are wrapped in blankets on top of their winter coats.These are the Hawkeye state's die-hard caucus-goers, who refuse to be cowed by the worst nature can throw at them.It is currently so cold in Iowa that coffee freezes instantly when you spill it. Back-to-back blizzards have turned roads into ice rinks. Hundreds of flights in and out have been canceled.
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