With the possible exception of a few in the Trump administration, elected officials in government, and the vast majority of the bureaucratic agency staff, in any department, agency, or group of persons with any control over policy, or enforcement of policy, with exception of some of the actual border patrol agents, has sought to ignore, undermine, and subvert the enforcement of immigration law. 

This includes Republicans, including the two mentioned in this article as having produced legislation. Even were the legislation to become law, it is unlikely that future administrations would even bother to read, let alone enforce it.

Voters want sensible laws enforced. Donors, on both sides of the aisle, don't want the law enforced. The more unskilled, and semi skilled, labor, the lower the wages paid to obtain that labor, and, the more readily available, on a moment's notice, that labor becomes. The inherent problems created for those who comprise that pool of labor are of no consequence.