Senate Majority Leader Mitch McConnell on Saturday said there would be no vote on any appointment picked by President Obama to replace deceased Justice Antonin Scalia — setting the stage for a dramatic political showdown in Washington.

McConnell said a new appointment would have to wait until a new president takes office.

"The American people should have a voice in the selection of their next Supreme Court justice. Therefore, this vacancy should not be filled until we have a new president," McConnell said in a statement.

With his previous two appointments, Obama was replacing liberal justices with younger liberals. But with Scalia, he'd have the chance to replace the justice who has held the fort down for conservatives on the court for the past 30 years, potentially moving the court dramatically to the left.

Democrats have already made it clear that they intend to push aggressively for a new justice to be appointed....