Most Jewish Americans are not comfortable with the Republican political themes of individualism, self-reliance, and limited government, even though the modern Republican Party, in practice, is almost as far Left on social issues as the Democrat Party.
Bottom Line....
Trump will not get more than 30% of the Jewish vote, and Florida is probably the only state where it will matter.
I hope you are conservative in the number of votes Trump will get, and it does matter outside of FL. Specifically PA, OH, and MI, all states the Trump needs to win again in 2020.
The intermarriage rates of Jewish people is very high, particularly among non-Orthodox Jews.
The notion of a Jewish vote or Jewish bloc is an oversimplification of what is actually on the ground.
A small number of wealthy Jews give large contributions to the Democratic Party. They represent themselves and nobody else.