Trump's decision to bring up Bill Clinton's sex scandals wasn't the only example of his failure to use the debate to reverse the declining fortunes of his campaign. As he did in the first debate, he displayed peevishness toward his opponent and also accused the moderators of unfairness. Even voters who agree with him about Hillary Clinton's use of a private email server to transmit classified information must have been taken aback when, after threatening to appoint a special prosecutor to investigate her, he said: "You'd be in jail." Candidates who promise to put their political opponents behind bars — or "open up the libel laws" to make it easier for politicians to sue newspapers — betray such a warped view of presidential power that they have no business occupying the office.