Immigration Law Enforcement & Federal Authority - The federal government has the right and responsibility to enforce immigration law and police the borders [1] - Contesting federal authority on immigration law is viewed as a threat to national unity [2] - Allowing states or municipalities to flout federal immigration law is compared to historical instances of defiance against federal authority [3] Potential Societal Impact - Continued defiance of federal law could lead to a breakdown of freedom of movement between states [4] - The current situation is portrayed as a potential threat to national cohesion, drawing a parallel to dangerous travel conditions in other countries [4] - Enforcing federal law by force is presented as a point of no return for the Trump administration [4]