On the issue of Gaza, Biden is dramatically out of touch with the voters he needs to win re-election. If he will not be moved by morality to stop his support of this war, he should be moved by vulgar self-interest. Gaza is not a distant foreign conflict: it is an urgent moral emergency for large swaths of voters. Biden will lose those voters – and may indeed lose the election – if he does not cease his support of these atrocities.
Biden has that rare opportunity in politics: to help the country, and himself, by doing the right thing. But he must do so now. Both the Palestinian people and his own election prospects are running out of time.
Until we get rid of FPTP voting nationally, 3rd parties cannot win and can only spoil. The best we can hope for is a third party is popular enough that they displace another party. Which would be a years to decades long change as local, state and national representatives get replaced slowly.
More likely what would happen is what the GOP did to the 2 contenders: the Tea Party and Insurrection Party. The GOP just absorbed and changed to meet them.