broadly speaking, republicans and democrats rarely differ in their israeli policy and if biden has institued an actual shift of policy on israel it would be unlikely for any republican to overturn it. this is where the institutional reality of the two-headed monster is most real. when the policy shifts, it's not driven by partisan political considerations and doesn't reverse based on political objectives.

israel is a ballot issue, but it is generally outside of the political control of elected american civilian leaders and in the hands of centcom and the pentagon.

that said, i do not think that biden has created a real shift in policy but will be seen historically as an anamoly and frankly as an aberration. the role of the next president, whoever it is, is going to be to undo the foriegn policy mess that biden has left, not just in israel but throughout the world, and is going to rely heavily on the direction of the pentagon to do it. they may not even know this yet, but it probably doesn't matter, the policy will be virtually identical.

i would advise that american jews look at other ballot issues.