Alabama Sen. Jeff Sessions on Monday slammed President Obama’s plan to open the floodgates to immigrant workers eligible for worker visas at a time when U.S. firms are dumping higher-wage Americans for lower-wage immigrants.

“The number of aliens authorized to work in the United States each year is limited by law, according to the number of foreign work visas and green cards that are statutorily available. Under this breathtaking executive action, those limits set by Congress are waived,” said Sessions in a statement.