In Iowa, GOP presidential candidates concerned about impact of freezing temperatures on caucus turnout

The Iowa caucuses Monday will be held during a dangerous, record-breaking cold front as Republican presidential candidates worry the impact will depress turnout. 

Temperatures are unlikely to break 0 degrees Fahrenheit, with wind chill pushing the temperature as low as -45 F Monday night, according to the National Weather Service. Officials are warning that frostbite can occur within 10 minutes of outdoor exposure and as Iowans will be lining up at their local caucus site, with some forced to wait outside for extended periods of time. 

"Outdoor exposure without proper...