The increase of Spanish cruelties in the island and Spain’s arrogant demands upon the United States, became so offensive that in his message to Congress December 6, 1897, President McKinley reviewed in detail the Cuban situation and showed how he had on repeated occasions entered protests against Spain’s uncivilized methods of warfare against the Cuban insurgents. Of the different lines of action open to the United States he rejected recognition of the insurgents as belligerents, and recognition of Cuban independence, and advocated that of intervention on the ground of humanity. On February 15, 1898, the United States Battleship Maine that had been sent to Havana on a friendly mission, and at all events as a visitor from a neutral power, was blown up in Havana harbor. Instantly the country was ablaze and a just and true course for the administration became difficult. House and Senate both proved impetuous and indulged in heated debates, whose prevailing sentiment was speedy war with Spain, without waiting the results of investigation by either the Navy Department or other commissions. President McKinley remained calm and retained hope of a peaceful settlement. He was chided by the hot-headed of both parties. It became plain that Congress was bent upon some radical step, and the President took occasion again, April 11, to review the entire Spanish and Cuban situation in a special and deliberate message, and to state that he had now exhausted every obligation imposed on him by the constitution to relieve an intolerable condition of affairs. He therefore left the issue with Congress, with the request that it authorize him to intervene for the purpose of stopping the war in Cuba and securing a stable government for the island by the use of the military and naval forces of the United States. On April 19 Congress, after exciting debates, passed a joint resolution demanding that Spain relinquish at once her authority in Cuba and withdraw her land and naval forces, and that the President of the United States be empowered to use the entire land and naval forces of the United States, and to call on the militia of the several states to carry the resolution into effect. On the next day the Spanish minister at Washington demanded his passports, and Spain declared diplomatic relations with the United States ended. A state of war existed, and Sampson’s fleet was ordered to blockade Cuban ports.