WASHINGTON Rick Perry, like other conservatives, has lots of complaints about the Supreme Court: The justices, he says, have meddled in social policy, stepped on state power and generally run amok. One solution the governor embraces is to end lifetime tenure - a cornerstone of the Constitution, whose drafters worried far less about activist or senile judges than about meddling tyrants and political pressure. The idea isn't original, and it's not limited to conservatives. Some scholars on the left have also embraced the idea as a correction for judges serving too long. It began to percolate in the 1980s and...