Derrick Van Orden

2:40 PM PT -- We've ID'd another legislator in the Edinburgh Castle crowd ... Michigan's Rep. Bill Huizenga is the guy in the blue jacket sitting against the wall. His spokesman told local outlet, Michigan Advance, what we'd already heard about this being a "long-planned, House Ethics-approved"…

4/1 8:52 AM -- A spokesperson for Wisconsin Rep. Derrick Van Orden tells TMZ ... "DVO is joining more than 30 other members of Congress on a delegation that was pre-approved by the House Ethics Committee months ago. The trip focuses on economic development, foreign partnerships, and…