A group of bipartisan senators is planning to beat President Obama's scheduled appearance in Las Vegas this morning by laying out their own vision for immigration reform first. Their intention is to make our current immigration system less of a living hell for American employers and foreign workers. The only stumbling block is anti-immigration Republicans—who have killed every recent reform effort. But before those GOP restrictionists get their knickers in a knot, writes Shikha Dalmia, they should consider that the status quo they are defending is a creation of Big Labor and completely antithetical to their bedrock commitment to a free market.