Secretary of State Antony J. Blinken and his French counterpart, Jean-Noël Barrot, criticized former President Donald J. Trump's talk of taking Greenland, calling it an impossible idea. They emphasized the importance of working closely with allies and not alienating them. They also discussed potential political turbulence in the coming years, including the war in Ukraine and conflicts in the Middle East. European leaders have been concerned about inflammatory statements from Mr. Trump and his allies, as well as the possibility of new tariffs. Mr. Blinken's visit to France comes at a time of intense domestic political division for the country.