Charles Grassley, a Republican senator, responded with a proposal to prohibit any company that had laid off Americans from hiring visa workers at all.

ECONOMIST: Skilled immigration

Under these circumstances it is no surprise then that domestic workers who compete against these visa holders sometimes complain that their wages are below market value, since the firm is effectively granted a monopoly over visa workers, and as a result able to grab a portion of the higher productivity an immigrant attains by moving here.

FORBES: How To Improve Immigrant Visas

It aims to strengthen border security while raising the cap on visas for high skilled workers and establishing a new visa program for low skilled workers on America's farms and elsewhere.

CNN: Immigration reform clears key Senate hurdle