Sen. Markwayne Mullin (R-Okla.) is standing in the way of a bipartisan push to tighten sanctions on the country of Georgia, which lawmakers and advocates say is the best way to stand up for pro-democracy forces and counter Russian, Chinese and Iranian influence in the country. Mullin is blocking passage of the Megobari Act — titled the Mobilizing and Enhancing Georgia’s Options for Building Accountability, Resilience, and Independence Act — bipartisan and bicameral legislation that codifies sanctions against officials in the ruling Georgian Dream party for human rights abuses, corruption, undermining democracy and deepening ties with American adversaries. In a...