You must caucus for Hillary.

At a time when the American right is captivated by a dangerous, racist demagogue with zero political experience, Hillary Rodham Clinton is the only Democratic candidate with the ability to take him down and the backing of a diverse coalition that actually looks like the America that Donald Trump wants to deport, degrade, and dismiss.

Hillary is a walking refutation of Trumpism: a woman who has beat back bullies of all kinds over more than four decades of public service; a determined progressive whose first job out of law school was doing civil rights work for the Children's Defense Fund (the organization's founder, Marian Wright Edelman, is supporting her 2016 candidacy); an experienced leader who has fought for liberal ideals as first lady, US senator, and secretary of state.

Yeah, Senator Bernie Sanders of Vermont talks a good revolutionary game. But his failure to rally a diverse coalition, his history of selling out certain liberal ideals for political expediency, and his peddling of unrealistic promises make him wrong for this political moment.

Let's review.

More than 25 states have now weighed in on the Democratic race. The result: Hillary has a commanding lead over Bernie in terms of pledged convention delegates (a lead that stays commanding even if you factor out Clinton's large stash of pledged "superdelegates"). To catch up, Bernie would need to win the remaining primaries and caucuses by the kind of yuge margins that he's failed to consistently capture so far. Sorry, Bernie, it's not gonna happen.

More concerning: A large part of Bernie's poor performance so far traces back to his failure to win support from minority voters. Perhaps you've heard about Bernie's big "upset" in Michigan on March 8? Bernie won Michigan by a slim 1.5 percent margin overall but lost the state's black vote big time. Hillary won 65 percent of the black vote in Michigan. She also won more than 80 percent of the black vote in Alabama, Georgia, and Mississippi, and nearly 70 percent of the black vote in Ohio. If Bernie is leading a revolution, it's an overwhelmingly white one. Bernie and his supporters should reflect on this failure. Black voters matter. Democrats don't win national elections without black voters, and they're speaking unambiguously in favor of Hillary.

As for Bernie's ideological purity: Please. Consider Bernie's votes against reasonable gun control. In debates with Hillary, he's basically admitted he voted against measures like the Brady Bill out of political expediency. But for someone who can read the political weather well enough to make craven compromises on gun control, Bernie is now making naive promises about getting massive new spending and tax increases through Congress. Remember: The Republicans currently control both houses of Congress. They need to keep control of only one chamber to prevent Bernie's pie-in-the-sky platform—as delicious as it may sound—from traveling any further than his lips.

While we're thinking about political revolutions, though, you know what's really revolutionary? Declaring, in 1992, that you won't be the kind of first lady to "stay at home and bake cookies." You know what else is revolutionary? Becoming first lady and deciding your job includes pushing a radical overhaul of our unjust American health-care system. You know what else is revolutionary? Going to the UN Conference on Women in Beijing in 1995 as first lady—over the objections of some of your husband's senior staff—and declaring, "Women's rights are human rights." You know what else is revolutionary? Being the first first lady to run for office, winning a Senate seat, and then becoming the first woman to launch a credible campaign for the office of the presidency of the United States. Twice.

Sure, Hillary is imperfect. She can be politically klutzy. She's not a natural politician, as she admitted in a recent debate, and she's made mistakes. She's also shown she can apologize and correct course. And for the most part, the Hillary behaviors that irk some Democrats actually point to her strengths, foremost among them her refusal to give up on making progress, somehow, even if getting there isn't always pretty.

This, fundamentally, is the difference between Bernie and Hillary. He offers self-serving paeans to uncompromising idealism from a safe harbor in which perpetual, righteous-sounding critique is viewed as its own victory. She offers the kind of grinding, determined pragmatism that gets results. Hillarycare, in time, became Obamacare. Hillary's bitter loss in the 2008 presidential election became her term as secretary of state under Barack Obama, the man who defeated her. (And take note, lefties: Paul Krugman, economist and NYT columnist beloved by progressives, has praised Obama for hiking taxes on the 1 percent. This happened even though Obama, like Hillary, took donations from Wall Street.)

Hillary's experience and depth of knowledge will allow her to wipe the debate floor with Donald Trump's orange face. She knows how to grind conservatives down to the bitter nubs of rage and resentment that they now represent. And despite what you may have heard, Hillary wants to overturn Citizens United, get us to health-care coverage for all, and block Keystone.

Hillary also has this: a shot at ending the patriarchal monopoly over running the richest and most powerful country on earth.

So don't be stupid. Don't be self-defeating. Don't play into the Republicans' hands.

Caucus for Hillary Clinton this Saturday.

The SECB is Sydney Brownstone, Christopher Frizzelle, Angela Garbes, Jen Graves, Heidi Groover, Ansel Herz, Tim Keck, Ana Sofia Knauf, Eli Sanders, Dan Savage, and Rich Smith. This is not a unanimous endorsement.