Donald Trump and his GOP rivals cancel almost all of their in-person events in Iowa less than 72-hours before the critical first vote in the Nation, as extreme weather and subzero temperatures upend their plans. Plus, the US launches further strikes against Iranian backed militants in Yemen, hours after President Biden said he had delivered a message to Iran with an initial attack. Is escalation now inevitable? And, there are potential complications for the Trump case in Georgia following allegations of an improper relationship between the Fulton County district attorney and her lead prosecutor.

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