They never were Pro his Toeiva -agenda. They didn’t openly go against him and wanted to vote for him because they figured his other Maalos outweigh this one Chessoron.
That makes it even worse, that they (The Lakewood “vaad” and its controllers) sold out to the Avoda Zara called Mammon. Corzine got the “Yeshiva” half a million dollars for a “Holocaust library”, so they had to repay in votes.
Had it been help in areas of Halacha (such as a bill regarding Metzitza, or Shmiras Shabbos, etc.) then perhaps there would be room to discuss.