Which of these factors increased u. s. public opinion in favor of a war with spain to free cuba?

The publication of the de Lome letter

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the answer is: the sesquicentennial of the american civil war is an occasion to consider the legacy of that great conflict. this legacy is our inheritance, and despite many indelible features, we continue to negotiate the resolution of that conflict. the civil war was fought over slavery, but not always on behalf of slaves