So much bullshit in one headline. John McCain is NOT appointing pro-choice justices. There's no "center".
And it also repeats this lie:
Democratic officials also gave a convention speaking slot to Sen. Bob Casey Jr., D-Pa., who opposes abortion rights. His father, the late Pennsylvania Gov. Robert P. Casey, was denied a coveted slot at the 1992 convention because of his opposition to abortion rights.
Casey Sr. did not support Clinton, the parties nominee, so he did not speak. I cannot be that hard to believe that this is pretty common practice at political conventions.