WASHINGTON — Talk about a civics lesson: A high-school senior has raised questions about political bias in a popular textbook on U.S. government, and legal scholars and top scientists say the teen's criticism is well-founded. They say "American Government" by conservatives James Wilson and John Dilulio presents a skewed view of topics from global warming to separation of church and state. The publisher now says it will review the book, as will the College Board, which oversees college-level Advanced Placement courses used in high schools.