closing law; in this, he ran up against boss Tom Platt as well as Tammany Hall—he was notified that the Police Commission was being legislated out of existence. His crackdowns led to protests and demonstrations. Invited to one large demonstration, not only did he surprisingly accept, he delighted in the insults, caricatures, and lampoons directed at him, and earned some surprising good will. Roosevelt chose to defer rather than split with his party. As Governor of New York State, he would later sign an act replacing the Police Commission with a single Police Commissioner. Emergence as a national figure Assistant Secretary of the Navy In the 1896 presidential election, Roosevelt backed Speaker of the House Thomas Brackett Reed for the Republican nomination, but William McKinley won the nomination and defeated William Jennings Bryan in the general election. Roosevelt strongly opposed Bryan's free silver platform, viewing many of Bryan's followers as dangerous fanatics. He gave scores of campaign speeches for McKinley. Urged by Senator Henry Cabot Lodge, President McKinley appointed Roosevelt as the Assistant Secretary of the Navy in 1897. Secretary of the Navy John D. Long was more concerned about formalities than functions, was in poor health, and left many major decisions to Roosevelt. Influenced by Alfred Thayer Mahan, Roosevelt called for a build-up in the country's naval strength, particularly the construction of battleships. Roosevelt also began pressing his national security views regarding the Pacific and the Caribbean on McKinley, and was particularly adamant that Spain be ejected from Cuba. He explained his priorities to one of the Navy's planners in late 1897: On February 15, 1898, , an armored cruiser, exploded in the harbor of Havana, Cuba, killing hundreds of crew members. While Roosevelt and many other Americans blamed Spain for the explosion, McKinley sought a diplomatic solution. Without approval from Long or McKinley, Roosevelt sent out orders to several naval vessels, directing them to prepare for war. George Dewey, who had received an appointment to lead the Asiatic Squadron with the backing of Roosevelt, later credited his victory at the Battle of Manila Bay to Roosevelt's orders. After finally giving up hope of a peaceful solution, McKinley asked Congress to declare war upon Spain, beginning the Spanish–American War. War in Cuba With the beginning of the Spanish–American War in late April 1898, Roosevelt resigned from his post as Assistant Secretary of the Navy. Along with Army Colonel Leonard