WASHINGTON — President Trump said Wednesday that the United States would no longer insist on a Palestinian state as part of a peace accord between Israel and the Palestinians, backing away from a policy that has underpinned the U.S. role in Middle East peacemaking since the Clinton administration. The Palestinians are highly unlikely to accept anything short of a sovereign state, and a single Israeli state encompassing the Palestinians would either become undemocratic or no longer Jewish, given the faster growth rate of the Arab population. Trump and Jared Kushner, his son-in-law and senior adviser, have been exploring an approach called the outside-in strategy, enlisting Arab states in the region that already have found common cause with Israel against their mutual enemy Iran to help broker a settlement with the Palestinians. [...] Trump’s team has largely avoided conversations with Palestinian leaders. Bill Clinton was the first president to endorse a two-state solution, saying in a speech in 2001 that the conflict would never be settled without “a sovereign, viable Palestinian state.”