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Again, google “Cardinal Ratzinger + abortion.” You will find that no Catholic offical has had more to say about abortion in the last 50 years. He will also read the riot act to Obama during their audience, but it will be private and Obama won’t care.
What the Pope won’t do is single out the United States or US politicians. That is not the Pope’s role, and there are countless other countries in the world that are more Catholic but have simiar abortion laws. The goal of Catholicism is to reach the individual, so she won’t have abortions, or he won’t perform them, and the both won’t vote for politicians who support them. Pope Benedict has already focused on these topics repeatedly.