Presidents of the United States - Last Name Only

The video tutorial provides a comprehensive list of U.S. Presidents, starting from the early leaders like Washington and Adams, moving through the 19th century with figures like Lincoln and McKinley, and continuing into the 20th and 21st centuries with Presidents such as Roosevelt, Kennedy, and Biden. The tutorial revisits some sections to reinforce learning and ensure retention of the chronological order of the Presidents.

Name the presidents listed in the text who have the last name 'Bush'.

Which presidents are mentioned in the text that served in the 21st century?