"Nine seems to be a good number. It's been that way for a long time," she said, adding, "I think it was a bad idea when President Franklin Roosevelt tried to pack the court." . . . "If anything would make the court look partisan," she said, "it would be that — one side saying, 'When we're in power, we're going to enlarge the number of judges, so we would have more people who would vote the way we want them to.' " That impairs the idea of an independent judiciary, she said. "We are blessed in the way no other judiciary in the world is," she noted. "We have life tenure. The only way to get rid of a federal judge is by impeachment. Congress can't retaliate by reducing our salary, so the safeguards for judicial independence in this country, I think, are as great or greater than anyplace else in the world."