Jews are over-represented in Congress as they are in finance, media, publishing, entertainment.
Although Jews make up 2 percent of the U.S. population, 7 percent of the new Congress is Jewish, with 38 Jews among the total of 535 lawmakers. In the Senate, the 10 Jewish members comprise 10 percent of that body; Jews comprise 6.4 percent of the House.
Nine Jews in the Senate are Democrats, the 10th, Bernie Sanders, is an Independent. In the House. all but two members are Democrats. The Republican exceptions are Reps. Lee Zeldin and David Kustoff, from New York and Tennessee, respectively. Only one other non-Christian Republican is in Congress according to a report by Pew.
Jewish Virtual Library
https://www.jewishvirtuallibrary.org/jewish-members-of-the-117th-congress