From the Morning Memo:

Tiffany Cabán, who mounted a competitive progressive challenge for the party’s Queens district attorney nomination against Melinda Katz, conceded the race Tuesday evening after a court battle and a close result in the June vote.

For progressives, the close-but-not-quite campaign of Cabán comes a year after Rep. Alexandria Ocasio-Cortez stunned the political world and defeated incumbent Joe Crowley in a Democratic primary.

Katz had been referred to throughout the race as the establishment candidate, and she did have the backing of figures like Gov. Andrew Cuomo, who headlined a fundraiser for her.

But established Democratic elected officials also gravitated toward the Cabán camp, including Sen. Mike Gianaris, the deputy majority leader in the state Senate.

And the Working Families Party, which had initially endorsed Crowley before his defeat, supported Cabán’s bid.

Tiffany Caban transformed the debate on criminal justice reform, not just in Queens but across the city and country as well,” said Bill Lipton, the WFP’s state director.

“She proved that progressive campaigns and the progressive movement can succeed across a borough as big and diverse as Queens, and that voters want fundamental changes to our justice system. We hope more courageous candidates like Tiffany run for office everywhere.”

Attention for progressive advocates who are pushing to reshape the Democratic Party could now turn to the 2020 primary elections, the first that will be held on a unified date in June for members of the state Assembly and Senate next year — leading to a new level of uncertainty.

After that, the 2021 race for New York City mayor — perhaps the biggest prize for grassroots advocates short of winning the governor’s office — is up for grabs.

Will progressive advocates have the momentum to carry them through to put one of their own in Gracie Mansion? A lot likely rides on the presidential election next year and whether a motivating factor — like President Trump in the Oval Office — remains.