The story is so familiar that by now it's a Capitol Hill cliche: Lawmakers from different parties meet in the gym and realize amid the clack of iron weights that they have more in common than not. But the latest version comes with a geopolitical twist. The senator and the congressman who forged a rapport in the House gym quietly collaborated in a way that is making it tougher for Russia to swallow up Ukraine. Rep. Josh Gottheimer is a New Jersey Democrat and Harvard Law grad who once...