From ABC’s Jake Tapper:

Tragedy struck the first filly in the Kentucky Derby since 1999, as Eight Belles went down on the track after her second-place finish today, broke two ankles, and was euthanized.

Showing a sisterhood with the female horse, Sen. Hillary Clinton, D-N.Y., during a trip to Louisville this week had said she was going to bet on Eight Belles to win, place, and show.

ABC News’ Karen Travers reports that Clinton told supporters in Jeffersonville, Ind., earlier this week, “I hope that everybody will go to the derby on Saturday and place just a little money on the filly for me.”