Several southern states do have runoffs for all but presidential elections. It's also the only way we can ever ensure that the voter's choice wins in presidential primaries.
Totally agree and I’d like to see it applied from primaries on up to president. The current system doesn’t serve anyone but to divide republicans against republicans and citizen against citizen who would otherwise find more in common provided they felt they had their say by voting for the candidate they believe in and then if losing voting for the one that is closest to the one they supported.