"Biden made FREQUENT trips to synagogue MINYANS and services in Wilmington, Del., with his Rabbi Leonard Gewirtz."
https://www.jewishtimes.com/115886/opinion-is-biden-good-for-the-jews/opinion/
In 2013, Biden had a Jewish Sukkah built at his home, by CHABAD
https://obamawhitehouse.archives.gov/realitycheck/blog/2013/09/25/first-vice-presidential-sukkah
"On the holiday of Sukkot, Jewish people spend time in the sukkah."
https://www.chabad.org/library/article_cdo/aid/609535/jewish/What-Is-a-Sukkah.htm