Facing the prospect that the United States might cut them adrift under President Donald Trump, European Union leaders launched a day of emergency talks Thursday in a bid to beef up their own security and ensure that Ukraine will still be properly protected. The 27-nation bloc woke up to news that French President Emmanuel Macron would confer with EU leaders about the possibility of using France’s nuclear deterrent to protect the continent from Russian threats. We talk with Nicolas Tenzer is a Non-resident Senior Fellow with the Democratic Resilience program at the Center for European Policy Analysis.