As important as it is for the House select committee investigating the Jan. 6, 2021, attack on the U.S. Capitol to make the nation understand what really happened on that horrific day, the panel has a more crucial mission: making sure that such an effort to overturn the result of a legitimate election does not happen again. The potential is there, because the sedition continues. That should not be lost as the bipartisan House panel lays its case before the American people. Jan. 6 was not just a day; it was the opening salvo of a movement to undermine democracy....