THIS SHOULD FRIGHTEN EVERY AMERICAN! Read closely what Hillary proposes.

Hillary Clinton tells Sanders voters that she’ll revise the First Amendment.

Hillary Clinton wants to win over Bernie Sanders voters, and on Saturday she bid for them by reinforcing her promise to rewrite the First Amendment to limit political speech that she and they don’t like.

“Today, I’m announcing that in my first 30 days as President, I will propose a constitutional amendment to overturn Citizens United and give the American people—all of us—the chance to reclaim our democracy,” Mrs. Clinton said in a taped speech to the Netroots Nation conference of progressives. First 30 days? Who knew the 225-year-old First Amendment was in need of such urgent revision?

Citizens United is the 2010 Supreme Court decision that restored the free-speech and association rights of corporations and unions. That decision was rooted, if we can use that word in polite Netroots company, in the language of the First Amendment. The constitutional amendment Mrs. Clinton has in mind would have to rewrite James Madison. Dead white males may be out of progressive favor, but we suspect most Americans still trust Madison more than they do the boys at the Daily Kos.

Mrs. Clinton knows that such an amendment won’t pass, so she also took up the spirit of Justice Ruth Bader Ginsburg’s recent comments that she expects a new liberal majority on the Court to rewrite the First Amendment the easier way. “I’ll also appoint Supreme Court justices who understand that this decision was a disaster for our democracy,” Mrs. Clinton said. “And I hope some of the brilliant minds in this room will seek out cases to challenge Citizens United in the courts.” So add one more litmus test for Mrs. Clinton’s Supreme Court nominees.

The presumptive Democratic nominee also said she’ll press the Securities and Exchange Commission to require publicly traded companies to disclose all political spending. The point here is to expose companies and CEOs to public vilification and boycotts if they donate to the wrong causes or candidates. Instead of moving to the center, Mrs. Clinton keeps raising the stakes of this election by moving left.

More From The Wall Street Journal (subscription required):