A few weeks after groups of migrants were dropped off in New Jersey en route to New York City, Republican leaders across in the Garden State are questioning a plan to potentially house some in Hunterdon County and calling for changes to the state’s immigration policies. The issue bubbled up this week when Hunterdon County Board of Commissioners Director Jeff Kuhl said in a news release that Democratic Gov. Phil Murphy’s administration has proposed using the closed Hagedorn Psychiatric Hospital in Lebanon Township as a center to process migrants. Kuhl said the plan would “likely overwhelm local…