The European Union Parliament has just passed a measure to end visa free travel for American citizens to EU countries. Despite a reciprocity agreement, the U.S. has never waived visas for citizens of five EU member states, Poland, Croatia, Bulgaria, Romania, and Cyprus.
The conflict has finally led to EU members of parliament refusing to let Americans travel without a visa into the EU until America honors its agreement to waive visa requirements for citizens of all EU countries.
It falls upon the European Commission to implement the measure passed by Parliament which sets May 2017 as the date for ceasing visa free travel to the EU by American citizens.
The obvious solution to this problem is for America to grant visa free access to all EU citizens. In normal times, the White House would probably respond to the EU putting its foot down by doing just that.
However, Donald Trump ran on a campaign of xenophobia and closed borders. It would be unreasonably optimistic to think he will actually try to cooperate with a foreign power, especially on a border issue. As long as Trump is the White House and the EU is committed to the fair treatment of all of its citizens, expect Americans traveling to Europe to face barriers.