The 1928 Republican National Convention was held at Convention Hall in Kansas City, Missouri, from June 12 to June 15, 1928. Because President Coolidge had announced unexpectedly he would not run for re-election in 1928, Commerce Secretary Herbert Clark Hoover became the natural front-runner for the Republican nomination. Former Illinois Governor Frank Lowden and Kansas Senator Charles Curtis were candidates for the nomination but stood no chance against the popular and accomplished Hoover. Chicago Mayor William Hale Thompson considered himself a candidate, but without the support of Ruth Hanna McCormick, his candidacy was unsuccessful.