April 18, 2025 (AP) — For more than a century, the majority of colleges and universities have not paid most taxes. The Revenue Act of 1909 excused nonprofits operating “exclusively for religious, charitable, or educational purposes” in order to continue acting in the public interest. President Donald Trump is looking to challenge that designation, complaining that colleges and universities are “indoctrinating” their students with “radical left” ideas, rather than educating them. And he has decided to start with the 388-year-old Harvard University, one of the world’s most prestigious institutions of learning and the first college founded in the American colonies.