The "odd" behavior you write of is due to the (D)s marching to the Abortion Lobby's insistence of using "any means necessary" to knock off judicial nominees they hate.
Look at the last election - if they were merely cynical bagmmen for abortion funds they could have easily replaced that particular lobby with another and won, or at least peeled of more votes. That cannot even seem to reach some sort of tacit agreement with the abortion lobby to just keep their mouths shut, let the Dem leadership mislead the public and get into office. Abortion has a nuch deeper grip on these people than just another special interest.
No it is abortion is part an parcel of the left's view of the human being. Almost even constituency on the left demands this as a litmus test.
The same sort of devotion and obsession evidently is being taken up with homosexuality.
So, while it is true that there is an "Abortion Lobby" that provides funds, Imthink it is deeper than that.