COURTING THE tariff king is a difficult enterprise. There aren’t any guidelines, no apparent channels by which to achieve him and no assure that anybody, aside from the person himself, could make a deal. Maros Sefcovic, the EU commerce commissioner, spent hours speaking with Jamieson Greer and Howard Lutnick, two of the president’s advisers, but got here away empty-handed. Neither has the authority to chop a deal. “Now we have supplied to barter,” says an EU official, “however Greer and Lutnick don’t have a mandate but. It’s all as much as POTUS.”