Analysis: Hearings are testing whether Americans can still agree on a shared reality

With the powerful case it has assembled against former President Donald Trump, the bipartisan House select committee investigating the January 6, 2021, insurrection may provide the clearest — and potentially most ominous — measure yet available of how completely red and blue America have separated into divergent information bubbles that no longer share even the most rudimentary agreement on the basic facts of American life.