I think the US has only been these things a few times: During Reconstruction Post-Civil War and when the Democrats generally controlled the Government pre-Reagan.
Since Reagan the Congress has been increasingly Partisan whilst the Presidency has been increasingly captured via a cult of personality. Clinton and Obama both appealed to essentially the same hopeful and yourhful demographic using "Star Power" whilst Bush Jnr and Trump both appealed to an electorate frustrated by inequality and frightened of outside influence.
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