National Republican Party Platform on Immigration

In my opinion all of the Republican platforms, 

National, Utah and Utah County Republican Platforms, support

Immigration as a National issue controlled by the Federal Government.

It will be difficult for all 50 states to have their own immigration policies that differ from the other 49 states.

Republican National Platform

Immigration, National Security, and the Rule of Law

Immigration policy is a national security issue, for which we have one test: Does it serve the national interest?  By that standard, Republicans know America can have a strong immigration system without sacrificing the rule of law. 
Enforcing the Rule of Law at the Border and Throughout the Nation
Border security is essential to national security.  In an age of terrorism, drug cartels, and criminal gangs, allowing millions of unidentified persons to enter and remain in this country poses grave risks to the sovereignty of the United States and the security of its people.  We simply must be able to track who is entering and leaving our country. 
Our determination to uphold the rule of law begins with more effective enforcement, giving our agents the tools and resources they need to protect our sovereignty, completing the border fence quickly and securing the borders, and employing complementary strategies to secure our ports of entry.  Experience shows that enforcement of existing laws is effective in reducing and reversing illegal immigration.
Our commitment to the rule of law means smarter enforcement at the workplace, against illegal workers and lawbreaking employers alike, along with those who practice identity theft and traffic in fraudulent documents. As long as jobs are available in the United States, economic incentives to enter illegally will persist.  But we must empower employers so they can know with confidence that those they hire are permitted to work.  That means that the E-Verify system—which is an internet-based system that verifies the employment authorization and identity of employees—must be reauthorized.  A phased-in requirement that employers use the E-Verify system must be enacted.