From their story today on post-Katrina politics:
Economic growth is crucial to reducing poverty, but the effect of tax rates is less clear. In 1993, President Bill Clinton raised taxes on upper-income families, the economy boomed and poverty fell for the next seven years. In 2001, President Bush cut taxes deeply, but even with economic growth, the poverty rate has risen every year since.
In 2004, about 12.7 percent of the country, or 37 million people, lived below the poverty line, which was about $19,200 for a family of four. The figure was 7.8 percent among whites, 24.7 percent among blacks and 21.9 percent among Hispanics.