So will Representative Joseph Crowley remain on the ballot in November, and challenge Alexandria Ocasio-Cortez as a third-party candidate on the Working Families Party?

That question, raised in an article in The New York Times about third-party politics in New York, took on a life of its own Thursday morning, as Ms. Ocasio-Cortez took to Twitter to complain about Mr. Crowley — with the longtime congressman quickly responding.

Ms. Ocasio-Cortez, 28, wrote on Twitter that Mr. Crowley “stood me up for all 3 scheduled concession calls. Now, he’s mounting a 3rd party challenge against me and the Democratic Party — and against the will of @NYWFP.”