AUSTIN - Democratic presidential candidate Barack Obama strayed onto Republican turf in Texas, agreeing Thursday with a core GOP principle: Be conservative when it comes to federal spending. "I am a progressive, but I always tell people that if you're a progressive you should be fiscally even more conservative than the so-called conservatives," he said. "The reason is, there are a lot of needs where we need to spend money, so we can't afford to waste money on stuff that we don't need." Obama was answering a question from a self-proclaimed fiscal conservative during a town hall meeting about the...