She made a mistake by not retiring at the beginning of Obama's second term. She didn't want a republican to appoint a replacement. Now there is a good chance that is what will happen.
That was my immediate thought as well. However, I think Trump's two nominations have been good ones. I've seen both of them side with both "wings" of the court, which I think is a good sign. We need more judges like Gorsuch and less like RBG, Roberts, Clarence Thomas, Kagan, or Sotomayor. We need judges who interpret the Constitution, not attempt to change it.