The 926 Republican delegates to the Republican convention in Philadelphia renominated William McKinley by acclamation. Thomas Platt, the "boss" of the New York State Republican Party, did not like Theodore Roosevelt, New York's popular governor, even though he was a fellow Republican. Roosevelt's efforts to reform New York politics - including Republican politics - led Platt and other state GOP leaders to pressure President McKinley to accept Roosevelt as his new Vice-Presidential candidate, thus filling the spot left open when Vice President Garret A. Hobart died in 1899. Although Roosevelt was reluctant to accept the vice-presidency, which he regarded as a relatively trivial and powerless office, his great popularity among most Republican delegates led McKinley to pick him as his new running mate. Ironically, Roosevelt would be elevated to the Presidency in September 1901 when McKinley was assassinated in Buffalo, New York.