Asia-Pacific markets were set to open mixed Monday as higher oil prices and escalating tensions between the U.S. and Iran weighed on investor sentiment after President Donald Trump 's rejected Tehran's latest proposal to end the war. Iran submitted a new proposal to U.S. negotiators focused on ending the Middle East conflict. Iran's semi-official  Tasnim news agency said that the counteroffer called for an end to the war on all fronts and the lifting of sanctions on Tehran, citing an informed source. However, Trump said he  did not like  Iran's response and called it "TOTALLY UNACCEPTABLE!" in a Truth Social Post. Meanwhile, Israeli Prime Minister  Benjamin Netanyahu  said Sunday that the war with  Iran  is "not over," as the U.S. and Israel still aim to curb Tehran's nuclear ambitions. Netanyahu's comments come ahead of Trump 's trip to China later this week, where he's expected to meet with Chinese President  Xi Jinping .…