The next debate stage is set …

The entrepreneur Andrew Yang earned 4 percent support in a Quinnipiac poll this week and qualified for next week’s Democratic debate just two days before the deadline. His entry brings the lineup to seven and ensures that the candidates onstage will not all be white.

Representative Tulsi Gabbard of Hawaii, who was also on the cusp of qualifying, did not get the final poll she needed. Even before the deadline, she had announced that she would not participate in the debate if she made the cut.

The Democratic National Committee has scheduled four more debates for January and February, one in each early-voting state: Iowa on Jan. 14, New Hampshire on Feb. 7, Nevada on Feb. 19 and South Carolina on Feb. 25. We don’t know yet what the qualification requirements will be, but once we do, we’ll be tracking the qualifiers here.

… but a labor dispute might affect it

The next debate is scheduled for Thursday at Loyola Marymount University in Los Angeles. It was moved there in response to a labor dispute at the original venue, the University of California, Los Angeles. But now there is a dispute at Loyola Marymount, too.

Members of Unite Here Local 11, a union representing food service employees at the university, are in contentious negotiations with the food service provider Sodexo and could picket outside the debate. All seven qualified candidates said they would not cross a picket line, raising the prospect of a debate boycott. But unions have used similar threats before as leverage in negotiations, and the dispute could be resolved before the debate.

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The Democratic National Committee said it would not expect candidates to cross a picket line and was “working with all stakeholders to find an acceptable resolution.”

You can read more about the dispute here.

President Trump, meanwhile, has threatened to boycott … every general election debate. Maggie Haberman and Annie Karni report that “Mr. Trump has told advisers that he does not trust the Commission on Presidential Debates, the nonprofit entity that sponsors the debates.”

Biden on immigration, and other new plans

Former Vice President Joseph R. Biden Jr. released an immigration plan on Wednesday that would reverse Mr. Trump’s policies, restoring the Deferred Action for Childhood Arrivals program, lifting limits on asylum applications and setting a much higher cap on refugees. In the long term, he is calling for a path to citizenship for undocumented immigrants.

In contrast to the more liberal candidates in the race, however, Mr. Biden would not decriminalize unauthorized border crossings or restructure Immigration and Customs Enforcement.