At least two weeks of government non agreement in the winner. At least four state governors have to declare for each side (Democratic/Republican) meaning they're affirming that "our candidate actually won" and that opposing it is bad/illegal/or something similar, and both sides are pursuing ongoing lawsuits and cases. No violence or coercion by gov't forces is required.
During this time China invaded Taiwan. Marked by any of
at least 100 PLA troops landing on any current Taiwan terr including Kinmen island and other close ones, contested landings or not.
Naval blockade of Taiwan either successful or repulsed by serious violence leading to at least five ships sunk and at least 100 sailors lost on the US or CCP side
Or bombing campaign in Taiwan leading to at least 100 deaths
If neither condition happens til EOY 2024 then NO