The issue focused on the way the law allows employers to hire illegal workers and how it has created a "chronic understaffing" problem at some federal immigration courts.

The Senate Judiciary Committee is scheduled to hear from a senior immigration judge on Friday. The hearing will include testimony from the U.S. Attorney for Arizona and U.S. Citizenship and Immigration Services and the Department of Homeland Security's acting chief for immigration enforcement and enforcement programs.

The hearing was originally scheduled to happen Monday, but