The International Federation of Professional and Technical Engineers urged the Senate to oppose legislation that would more than double the H-1B visa program for high-skilled workers, arguing there is no shortage of U.S. workers capable of filling the jobs the foreign visa holders would get.

“Employers’ claims of a [Science, Technology, Engineering, and Math] labor shortage are unchanged for over 25 years. If the H-1B program is meant to resolve a labor shortage, then it has demonstrably failed. A better explanation is that employers have simply become dependent on a renewable supply of 800,000 young, dependent, precarious, foreign temporary workers who have no leverage in the labor market,” the labor union said in a letter Wednesday to Senate lawmakers.