"Through the H-1B programme, those who hold visas are not supposed to replace Americans with jobs. Any such allegations are very troubling to me, I believe that such matters should be investigated," Johnson told lawmakers during a Congressional hearing.
Responding to a question on this issue, Johnson sought the help of the Congress in this regard.
"I think that Congress can help through increased enforcement mechanisms for situations where an employer does in fact, replace American workers with H-1B holders. That is the recommendation that is made to me and I support that," Johnson said.
"Now, if that is true, that is a very serious failing of the H-1B programme, and it being used to displace American workers rather than to supply for people slots that American workers can't fill," he said.
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Nadler said he has been looking at it sympathetically, to increase a number of H-1B visas.
"In fact we voted out of this committee and increase of 50,000 H-1B visas, to which most of us on our side of the aisle voted against only because of the provision to eliminate an equivalent number of diversity visas," Nadler said.