In the ensuing election—the running of which forced Athlone to cancel the planned tour of Prince Edward, Prince of Wales—the National Party won a majority of seats in the National Assembly, meaning Athlone appointed the party's leader, James Barry Munnik Hertzog, as his new prime minister. At the time, Afrikaner nationalism was increasing in the dominion, and Hertzog was a republican who promoted the secession of South Africa from the British Empire. As such, he proposed the country adopt its own flag over the Union Flag. Athlone, however, proved sympathetic and tactful, and resolved the issue by advancing a flag that was unique to South Africa, but which still contained the Union Flag within it, despite opposition from numerous Afrikaners. He also gained popularity with South Africans of all races through his frequent tours of the country, performing a number of ceremonial duties, including opening Pioneer Park in Johannesburg.