Republican and Democratic negotiators included the measure in a catchall spending package agreed to late yesterday and unveiled in the dead of night that sets federal expenditures at USD 1.149 billion through September 30, 2016, the end of the fiscal year.
The text, which is expected to be voted on by tomorrow, includes the legislation adopted by the House of Representatives last week which excludes citizens from VWP countries who are also dual nationals from Iran, Iraq, Syria and Sudan.
Such foreign nationals will not be barred from travelling to the United States, but they will be required to obtain a visa prior to their visit through standard means, which includes a face-to-face interview at a US consulate.
About 20 million people each year come to the United States without a visa for stays of less than 90 days, including about 13 million Europeans.
More From This Section
Non-profit groups have called the measure discriminatory since it punishes certain European citizens based on their national origin from Muslim-majority countries.
"Once again, members of Congress are using the government funding bill to pursue their extremist agendas," said Anthony Romero, executive director of civil liberties group ACLU.
"Sneaking damaging and discriminatory riders into a must-pass bill usurps the democratic process and is irresponsible."
Some US lawmakers had sought to kill or amend the measure, expressing concerns that European nations would offer reciprocal treatment against US travellers.