The need to apply for a visa to travel to a country is widely seen as a turnoff to potential visitors, given the extra cost and time an application requires. A country looking to boost its tourism industry will often look at loosening any existing visa requirements.

Making it more difficult for U.S. citizens to travel to Europe would certainly deprive the European travel and tourism sector of essential revenue. It will also put thousands of European jobs at stake in one of the few sectors that experiences a strong growth in employment.  According to an article from The Telegraph, "some 30 million American tourists visit Europe each year, spending more than $54 billion (£44bn)."

But the European Parliament voted to end visa-free travel for Americans in response to the Trump administration’s refusal to extend travel freedoms to citizens of five EU countries – Bulgaria, Croatia, Cyprus, Poland and Romania – as part of a reciprocity agreement.  Although Canada has those same restrictions, they will be lifted by the end of the year.

In February 2016, holders of a United States passport could travel to 174 countries and territories visa-free or with visa on arrival, and the United States passport was ranked 4th (tied with Belgium, Denmark, and the Netherlands) in terms of travel freedom according to the Visa Restrictions Index.

The growing "Visa War" between the EU and the U.S. will have a major impact on global mobility, according to global residence and citizenship advisory firm, Henley & Partners.