Voters venture into sub-zero temperatures Monday to kick off the Republican presidential nomination race with the Iowa caucuses, the first major test of whether runaway front-runner Donald Trump is as much of a sure thing as he appears.
With a commanding lead in polls, the ex-president is expected easily to win the Midwestern state's first-in-the-nation vote as he bids to be the Republican standard-bearer against President Joe Biden in November.
But Iowans may have to contend with the coldest conditions in the modern era of presidential election campaigns, with blizzards and a potential wind chill of -26 degrees Fahrenheit (-32 degrees Celsius) forecast.
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