Public anxiety over the possibility that President Donald Trump may refuse to accept an electoral loss in November is now reaching a fever pitch. The concern is, alas, valid: Trump has shown time and again that he’s uninterested in playing by the rules of our democracy and that he’s unable to accept the notion that he could be wrong, much less suffer a loss without insisting it’s the result of someone else cheating. That’s why it’s urgently important to understand where the key uncertainty lies heading into November: It’s not legal; it’s mental. The fact is that the law has remedies and fixes for the most likely ways in which Trump might attempt to resist defeat at the polls. The law, by and large, should be able to handle what may be coming. The real threat, then, lies not in formal guardrails but in our confidence. The threat is that Americans accepting those legal answers as legitimate is shaky, and that is where Trump can do the most serious damage.