It's unlikely this is a momentary phenomenon. It's hard to find data, but this over-representation is not new. Looking at a single, albeit important, political post, in the 53 years since 1970, the chair of the Federal Reserve has been Jewish for 38 of them: https://en.wikipedia.org/wiki/Chair_of_the_Federal_Reserve

To not base conclusions on a single data point (maybe the Fed Chair is an outlier), US Jews also contributed 50% of all donations to the Democratic party, and 25% to the Republican party: https://www.jpost.com/US-Elections/US-Jews-contribute-half-o...