It's been nearly four years since activists engaged in a battle over a Supreme Court nomination, and a tepid one it was.
Republicans barely pushed back on President Obama's 2010 nomination of Elena Kagan, his second appointment in as many years. She was confirmed by the Senate, 63-37.
At the time, influential Republican Sen. Jon Kyl of Arizona acknowledged the problem inherent in pursuing a high court battle: The GOP had only 41 Senate votes, making it "pretty difficult" to sustain a filibuster against Kagan, or any Obama appointee.
That could change by year's end.