Obama's high-court pick is no 'stealth candidate.' She has made some 450 judicial decisions. What's more, she has not been shy about expressing her opinions publicly.
In nominating Sonia Sotomayor, the president cited both her judicial experience and her compelling personal story.
There's never been a Hispanic on the high court though they're 15 percent of the US population.
But the court's balance of power may not change much, as Justice Souter, a conservative choice, consistently voted liberal.
He'll face pressure from his liberal base in his pick for the Supreme Court.