Impeaching Trump could happen more than once

As Democrats announced two articles of impeachment against President Donald Trump on Tuesday morning — abuse of power and obstruction of Congress — I heard the country breathe an audible sigh of relief.

Our long, national nightmare is finally over.

Anxieties over would-they or wouldn’t-they, the constant public opinion polling updates, hours-long hearings, cable news arguments over the prudence or peril of pursuing such a serious course of rebuke against the president, market uncertainty and hand-wringing over how this may affect 2020 — all of this can finally stop, and...