We are in the primaries. This year, the primaries are completely meaningless. We all know that it will be Biden vs Trump in November. Whatever happens before that is not important.
Furthermore, on Israel both Biden and Trump basically have the same position. The main difference I can see is that Trump will probably do something against Iran, while Biden will not do anything against Iran. Trump will probably abandon Ukraine and to balance this, he will go hardcore against the middle east Islamic groups. For this reason, I think Israel prefers Trump in November. It will be interesting to see if the muslims in the USA will help Trump (by not voting for Biden).