Democrats running for their party’s presidential nomination in 2020 are staying away from next week’s American Israel Public Affairs Committee (AIPAC) conference, in what progressive groups see as a sign of a shifting political tide.

Candidates’ announcements about not going to this year’s conference come after liberal group MoveOn called on 2020 Democrats to skip the gathering, which typically attracts a who’s who in politics and foreign policy and has hosted presidential candidates in the past.

“The influx of progressive candidates confirming they will not attend –– even those who have gone in years past –– shows how the momentum is shifting,” Iram Ali, campaign director at MoveOn, said in a statement Wednesday. “AIPAC is clearly a partisan lobbying group that has undermined diplomatic efforts, and progressives want no part in it.”

As of Thursday evening, aides for at least eight candidates told The Hill or other news outlets they would not attend this year’s conference: Sens. Kamala Harris (D-Calif.), Bernie Sanders (I-Vt.), Kirsten Gillibrand (N.Y.) and Elizabeth Warren (D-Mass.); former Rep. Beto O’Rourke (D-Texas); South Bend, Ind., Mayor Pete Buttigieg; Washington Gov. Jay Inslee; and former Housing and Urban Development Secretary Julián Castro.