Marc A. Thiessen Wednesday’s vice-presidential debate was like traveling back in time to an era when political debates were tough, respectful and substantive. And Vice President Pence put on a clinic for how to rope-a-dope your opponent. He anticipated almost every line of attack Sen. Kamala D. Harris (D-Calif.) had prepared, and was ready with a devastating rebuttal. Harris’s best moment came at the start of the evening when she prosecuted the case against President Trump’s handling of the covid-19 pandemic. But it did not go unnoticed that, unlike moderator Susan…