UPDATE (Wednesday, March 16, 2016 11:15 ET): President Obama has nominated Merrick Garland to fill the vacancy on the Supreme Court seat.

Arch-conservative Supreme Court Justice Antonin Scalia tragically passed away this weekend. Now, President Obama has a once-in-a-lifetime chance to bring a pro-woman justice to the Supreme Court.

But Senate Republicans are vowing left and right to block the President from appointing Justice Scalia's replacement. That's because in less than four months, the Court will decide the biggest abortion rights case in over a decade--Scalia's replacement will have the power to secure critical women's health access for a generation.

The stakes are too high to let the Senate Republicans block this crucial nomination. We need to let them know that pro-women voices outnumber their extremist flank. Can you sign this urgent petition?