These do exist in some states, under the name runoff elections. They cost campaigns and taxpayers a lot of money, and election turnout in the US is already bad

These do exist in some states, under the name runoff elections. They cost campaigns and taxpayers a lot of money, and election turnout in the US is already bad enough without having people return to the polls a second time. https://www.thirdway.org/memo/high-costs-and-low-turnout-for-u-s-runoff-elections https://www.thirdway.org/memo/high-costs-and-low-turnout-for...