[106]
On June 2, 1924, Coolidge signed the act granting citizenship to all Native Americans born in the United States. By that time, two-thirds of them were already citizens, having gained it through marriage, military service (veterans of World War I were granted citizenship in 1919), or the land allotments that had earlier taken place.[107][108][109]

1924 election
Main article: 1924 United States presidential election
1924 electoral vote results
The Republican Convention was held on June 10–12, 1924, in Cleveland, Ohio; Coolidge was nominated on the first ballot.[110] The convention nominated Frank Lowden of Illinois for vice president on the second ballot, but he declined; former Brigadier General Charles G. Dawes was nominated on the third ballot and accepted.[110]
The Democrats held their convention the next month in New York City. The convention soon deadlocked, and after 103 ballots, the delegates finally agreed on a compromise candidate, John W. Davis, with Charles W. Bryan nominated for vice president. The Democrats' hopes were buoyed when Robert M. La Follette, a Republican senator from Wisconsin, split from the GOP to form a new Progressive Party. 