On the eve of a ceasefire in Gaza and with a wider peace in the Middle East on the table, it’s time to admit that the president’s unorthodox doctrine is proving more effective than that of any US president since Bill Clinton - so how does he do it, asks Mary Dejevsky D onald Trump has made no secret of his ambition to go down in history as a peacemaker . The dramatic agreement on Gaza, underwritten by Trump and finalised in the Egyptian resort of Sharm El-Sheikh, is envisaged as just the first