If I was the President of the US for the last four years:
1. I would have forced the PA to negotiate a deal with Israel, i.e., to make the necessary concessions. I would clearly support the settlements and take the position that Israel should include most settlements so that less that 5% of the settlers would have to be moved. This could be done by reducing the PA’s economic and diplomatic support. I would have moved the US Embassy to Jerusalem to indicate my belief that at least the west part of Jerusalem would remain in Israel in any settlement.
2. I would have insisted on UNRWA being unwound. This could be done by economic pressure. I would have insisted that all Palestinians be given citizenship in their host countries or would have arranged for their re-settlement elsewhere but not in Judea and Samaria.