Annexation, if it occurs, could have a number of implications for U.S. policy and U.S.-Israel relations depending on its timing, territorial extent, legal nature, and physical enforcement. Other consequences would likely follow from Palestinian and other international responses, as well as the potentially significant impact on Jordan. Given these implications, U.S. officials reportedly want greater consensus among Israeli leaders before the Trump Administration would recognize a proposal from Netanyahu on annexation, with particular focus on the support of key Israeli officials from outside Netanyahu’s Likud party, including Defense Minister Gantz and Foreign Minister Gabi Ashkenazi.
Source: Israel’s Possible Annexation of West Bank Areas: Frequently Asked Questions