Grassley has asked for statistics on the number of B-1 visas being issued, which employers are using them, and the lengths of time a visa holder remains in the U.S. on a B-1, among other things. He wants the departments to respond by April 28.

Infosys was not immediately available for comment on the Grassley letter. But in a statement earlier this month, the company said that it was "in the midst of a detailed internal review to understand whether inappropriate actions were taken in the visa application process. We are moving as quickly as possible on this important work."

Palmer's case is being heard in a U.S. District Court in Alabama. Infosys has filed a motion asking that the case be moved into binding arbitration, citing an employment agreement with Palmer. In a court filing this week, Palmer's attorney objected to that motion.

Mendelsohn said Palmer "is honored that Sen. Grassley has taken an interest in his case," and hopes that this lawsuit will help Grassley "in his efforts to better enforce our laws and to enact more legislation to help American workers."

Patrick Thibodeau covers SaaS and enterprise applications, outsourcing, government IT policies, data centers and IT workforce issues for Computerworld. Follow Patrick on Twitter at or subscribe to . His e-mail address is .