Ephraim Schwartz writes at Infoworld (quoting the major presidential candidates):

Hillary Clinton "I also want to reaffirm my commitment to the H-1B visa program and to increase the current cap. Foreign skilled workers contribute greatly to our technological development. That is well understood in Silicon Valley."

John McCain "I will continue to support H-1B visas, but, I’m telling you, the American people's priority is, either rightly or wrongly, and we live in a democracy, is that we secure the borders first."

Barack Obama "We can do better than that and go a long way toward meeting industry’s need for skilled workers with Americans. Until we have achieved that, I will support a temporary increase in the H-1B visa program as a stopgap measure until we can reform our immigration system comprehensively."

In 2004, Ralph Nader was quoted by Rob Sanchez as saying:

I don't believe in giving visas to software people from the Third World when we have got all kinds of unemployed software people here.