On a damp November evening in Niagara-on-the-Lake, Marco Rubio watched as G7 foreign ministers lined up for the obligatory family photo at the Canadian resort.He appeared less like a local politician who fights for soundbites on TV panels and more like a serious statesman or policymaker.This is what he has quietly become: the indispensable man in a very messy world. The Trump administration's Gaza ceasefire was fraying, European allies were flirting with unilateral recognition of a Palestinian