HOUSTON (Reuters) - A study of thousands of federal court cases has found that judges appointed by President Bush (news - web sites) are the most conservative on record in the areas of civil rights and civil liberties. The study's authors say the re-election of Bush would give U.S. courts a strong rightward tilt that could last for years. "If Bush wins re-election you're going to have a very conservative judiciary," University of Houston political scientist Robert Carp said on Thursday. "An average president puts in about a third of the federal judiciary in two terms, so this really is...