您列的不是其全部承诺；但他确实承诺学贷减免了，见内

https://www.politifact.com/truth-o-meter/promises/biden-promise-tracker/promise/1595/forgive-student-loan-debt-public-colleges-and-univ/#:~:text=As%20a%20presidential%20candidate%2C%20Biden%20had%20promised%20to%20forgive%20undergraduate,emergency%20due%20to%20the%20coronavirus.

https://finance.yahoo.com/news/10-economic-promises-biden-made-115657793.html

https://www.verifythis.com/article/news/verify/money-verify/biden-student-loan-debt-forgiveness/536-48a24e4b-d576-470e-9b43-fc9ca11ac341