Rabbi Feivel Cohen the author of Badei HaShulach is one of the senior Poskim in AMerican and Senior Rov in Flatbush.
Rabbi Hillel David is the same.
Rabbi Yisroel Belsky shlita is A rosh Yeshiva in Torah V’das and Rov to many.
They have all indicated quite firmly and clearly their “Conservative postions on who to vote for.
Laws do make it hard for them to endorse from the podioum.