Condeming abortion in general without any further action toward those supporting it is exactly the sort of lazy moral leadership that lead to the current problem. Support of abortion to the extent you assist other in obtaining them (pretty much all politicians fall in this category) carries an automatic excommunication. Where is this sort of pronouncement?
Then they are excommunicated. It doesn't need to be officially declared by the Church, and doing so is and I think (?) has always been quite rare.