Hill Trade Advice:  The U.S. House Ways & Means’ Trade Subcommittee holds a hearing tomorrow on American trade negotiation priorities. Witnesses include those from agriculture, those impacted by trade retaliation, services, and former Republican trade officials. The Trump Administration has not asked for any trade advice from Congress, though Republican members have asked the White House to seek market openings for agriculture and to avoid retaliation against the sector.   Roundtrip Costs: Agricultural trade experts have advised the U.S. Trade Representative that imposing a 25 percent tariff on Chinese ships landing in U.S. ports will make American farm exports less competitive. That’s because Chinese shippers...