Which political party did President William McKinley belong to?

Caroline Harrison was married to which president? Under which president did Adlai Stevenson I serve as Vice President? Which number president was William McKinley? Who succeeded William McKinley as President of the United States? Which president served from 1897 to 1901? In what year did William McKinley first take office as President? In which state was William McKinley born? Who was William McKinley's first Vice President?