A company run by a liberal billionaire dubbed by some as the “next George Soros” employs former senior Republican staffers on Capitol Hill in what a watchdog group warns is an effort to sway GOP lawmakers to move to the left. Arnold Ventures LLC is a private company founded by left-leaning philanthropists John Arnold and his wife Laura, who have a net worth of $3.3 billion, according to Forbes. Arnold Ventures says it focuses on issues such as criminal justice reform, prescription drug prices, contraception, and tax policy geared at “minimizing injustice.” Most prominently, Arnold Ventures employs three well-connected Republicans:...