David Graham: “The number of prominent Republicans distancing themselves from Trump has accelerated, or at least reached a critical mass, in the past 10 days.”“The shift is interesting—first, as an indication of what information GOP candidates are receiving privately about the president’s unpopularity and its drag on them, and second, because public critiques of Trump from Republicans have been vanishingly rare, no matter how unwise, outrageous, or unpopular his actions have been.”“But the defections are perhaps better understood as a sign of normalcy, even in a deeply abnormal context. A president’s party almost always loses seats in a midterm, a result of the pendulum effect in elections. And the dynamics of this race are especially challenging for Republicans because Trump is historically unpopular, outpacing even his own poor ratings in 2018, when Democrats dominated the midterms.”