Is Europe Ready for Possible Return of President Trump?

FILE — French President Emmanuel Macron, left, walks with former U.S. President Donald Trump at NATO headquarters in Brussels, July 11, 2018. During a town hall meeting last week, Trump refused to commit to U.S. membership of NATO if elected to a second term.

America's allies in Europe are debating how to prepare for a possible second term for Donald Trump in the White House after he secured a record win at Monday's Iowa Republican caucuses, cementing his place as front-runner to take on Joe Biden in November's election.