Democrat Presidents do not appoint “swing votes.”
The Democrat-run, Republican majority senate will rubber stamp whoever Obama picks with only a token show of opposition.
Obama will doubtless seek to appoint the most far left justice he can find, which should be easy, the courts are packed with radical leftists. He will also need to satisfy the entire spectrum of the Democrat coalition. I don’t know where he is going to find a dead black transgendered illegal immigrant Muslim felon to appoint to the court, but I know that Mitch McConnell will approve hyr.