 again from this article, Julie Swig writes in Lady Bird Johnson, hiding in plain sight, that Lady Bird posed a question to her husband. Given how polarizing a figure he had become in a now splintered nation, could LBJ possibly be the only one to unify the country? Lady Bird asked him, suppose someone else were elected president, what could Mr. X do that you could not do? And the president's answer, unite the country and start getting things done. She asked the pivotal question that made him realize he should not run for re-election.