They can't offend the two biggest public employee unions, the NEA and AFSCME, IIRC.
That the Democrats like to kill babies should not be a surprise to anybody, and the faster the pro-lifers get out of that gang the better off the whole country will be.
I think it will be more a function of time and the grim reaper, especially on the ethnic Catholics that survived the Depression. My mom was born in 1917, goes to Mass every Sunday, always voted as far as I know except 2000, when she was still recovering from bilateral knee replacement, and always voted for the rats.