FDR did indeed have a fairly large number of Jews working for him, so much so the Jew-haters still refer to the “Jew Deal”.
Bernard Baruch was called the “Unofficial President”, and Jews like Ben Cohen, Felix Frankfurter, and Sam Rosenman were very close to FDR.
I have done extensive reading about that era and have spoken to many Jewish elders who lived through it. Yet never have I heard any mention of anyone using the term "Jew Deal."
Of course, there was a stronger degree of anti-Semitism present in the US at that time, especially in German immigrant communities where Hitler had a following, so it would be no shock for those jerks to blame any social malady they could think of on "the Jews," regardless how much Jews were actually involved if at all.
To the best of my knowledge, no New Deal agency was headed by a Jew. And one of the "crown jewels" of the New Deal alphabet soup agencies, the much ballyhooed National Recovery Administration (NRA), was (mercifully) declared to be unconstitutional by the Supreme Court in litigation brought against the Roosevelt Administration by an unmistakably Jewish party: the Schecter brothers who owned a kosher poultry business in Brooklyn, NY.
Bernard Baruch was called the Unofficial President, and Jews like Ben Cohen, Felix Frankfurter, and Sam Rosenman were very close to FDR.
Never heard of Ben Cohen. Felix Frankfurter was Roosevelt's Jewish Supreme Court appointee, but there had been two previous Jewish SCOTUS justices - Louis Brandeis (appointed by Wilson) and Benjamin Cardozo (appointed by Hoover) - so the Frankfurter appointment wasn't groundbreaking in that regard. Sam Rosenman was Roosevelt's Jewish political guru; Roosevelt realized at the time that Jewish votes were concentrated in large electoral vote states, so he pandered in a superficial way.
All in all, though, the American Jewish community as a whole then was relatively lower in socioeconomic status in comparison to what it would become, and its political influence accordingly nowhere near as strong, which is one reason why Roosevelt could dawdle on the pressing issue of the plight of European Jewry.