The Trump administration has shown that polls for approval ratings are basically meaningless. Americans are going to staunchly vote for the party no matter how poor a job a President is doing. Nothing he does will ever move the opinion of his core base. Trump or any other Republican candidate could probably brazenly obliterate Iceland with nukes and rationalize that he's trying to reactivate volcanoes to terraform earth for America's benefit and the base would still support their leader.
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