Wyoming Governor Matt Mead has joined a majority of U.S. governors in saying he doesn't want to accept Syrian refugees.

In a letter to President Obama the governor says Wyoming ''will not accept a system that allows terrorists from any country in our state".

He says before any more Syrian refugees are allowed in the President needs to make sure a proper vetting system is in place to make sure terrorists aren't among those seeking refuge in the U.S.

The governor issued the letter on Tuesday, joining at least 27 other state governors in saying they don't want to accept refugees from Syria at least until safeguards and a proper vetting system to guard against terrorists can be implemented.

But, Governor Mead and the other governor's powers are limited in this situation.

The Refugee Act of 1980 gives the president the power to admit refugees who face persecution or a well-founded fear of persecution based on race, religion, nationality, membership in a particular social group or political opinion.

A 2012 decision, Arizona v. United States, reaffirmed the federal government's authority over the states on immigration matters and specifically stated that it might be "inappropriate" to return an immigrant to a country mired in civil war.