In present day America, the two political parties do not make foreign policy, aside from hollow proclamations. A Republican-controlled Congress is only good for talk. The State Dept. does not make it either, it only executes the diplomatic maneuvers. The real power in foreign policy lies with the national security community and the military. As such, the Netanyahu administration, if it thinks it will benefit from the mid-term elections in the US, is going to be disappointed. It still going to face the reality that the national security community and the military increasingly see the present course of Israel as America's strategic liability.
Suspect Bangkok bomber arrested, found with possible bomb-making materials (Reuters)
from the article: How will the Republican-controlled House affect U.S.-Israel ties?