Commentary As I write, the Senate has just acquitted former President Donald Trump. The incident offers some lessons for conservatives. These lessons are presented in no particular order. All are important. The final vote, like the entire impeachment process, demonstrated the degraded state of Congress. For example, 55 senators voted that they had jurisdiction over the case. But it’s clear that they didn’t really weigh jurisdiction and the merits separately. That’s because all 55 voted to convict. It seems the vote for jurisdiction was driven purely by the desire to nail Trump. Two senators who voted against jurisdiction nevertheless voted for conviction. Consider that for a moment: They conceded the process was illegitimate—but they still wanted to use it: “Yes, I know this is a kangaroo court, but I’m going to let it lynch you anyway.” Seven Republicans voted to convict. They will be hearing from the grassroots. How will …