Second, it is not, nor should it be, the job of the Democratic National Committee chairman to set the direction of the party, and neither Mr. Perez nor Mr. Ellison (nor, for that matter, any of the other major candidates) proposed to do so. It wasn't right that the DNC under former chairwoman Debbie Wasserman Schultz tried to tip the scales during last year's presidential primaries against Sen. Bernie Sanders and in favor of Hillary Clinton (albeit in ways that probably didn't determine the ultimate outcome), and it would be equally wrong for her replacement to tilt the party toward one faction or another. Rather, what the party chairman needs to be doing is what both Messrs. Perez and Ellison promised to do (and what Mr. Ellison can help Mr. Perez do in his new role as deputy chair): help translate the grassroots energy Mr. Trump has inspired into quality candidates running for everything from city council to U.S. Senate seats. Republicans took over Congress in 2010 not because the Republican National Committee had a grand strategy but because the grassroots enthusiasm of the tea party movement led new candidates to run for office. Democrats can succeed, too, if they put aside for the moment debates about what the party should mean and instead play the hand they've been dealt.