With polls showing President Trump having only the narrowest possible path to reelection, far narrower than in 2016, the importance of keeping a Republican Senate majority grows exponentially.

Already, a Trump loss would mean an old, weak, liberal Joe Biden would be president, with hard-left Kamala Harris waiting with a lean and hungry look, backed by a Democratic Party that, for 20 years, has moved markedly left-radical. With overwhelming sentiment in that party pushing serious and growing threats to kill the filibuster, pack the courts, and “transform the country,” the prospect of Democratic control of the presidency and both chambers of Congress should frighten not just conservatives but all people with centrist persuasions.