Woodrow Wilson

http://www.worldwar1.com/biocwil.htm

http://www.pbs.org/wgbh/amex/wilson/portrait/wp_wilson.html

http://www.whitehouse.gov/history/presidents/ww28.html

Theodore Roosevelt

http://www.theodoreroosevelt.org/

http://www.whitehouse.gov/history/presidents/tr26.html

http://nobelprize.org/peace/laureates/1906/roosevelt-bio.html

http://www.socialstudieshelp.com/Lesson_67_Notes.htm

William Howard Taft

http://www.whitehouse.gov/history/presidents/wt27.html

http://www.sparknotes.com/history/american/gildedage/section10.rhtml

http://www.course-notes.org/parties/progressive.htm