A big freeze is affecting large parts of the United States, particularly in Iowa where Republican Party presidential hopefuls are in the final stages of campaigning for the caucus. This extreme weather is causing transport issues and heavy snowfall. Both Ron DeSantis and Nikki Haley, White House hopefuls, have had to cancel campaign events due to the freezing temperatures. Despite their competition, they are both far behind Donald Trump in the race. The cold temperatures have also led to flight cancellations and disruptions to American Football games. The Western US is also bracing for snowstorms.