The Sheldon Adelson-backed YG Action Fund, run by former aides to House Majority Leader Eric Cantor (R-Va.), is launching $2 million in advertising to boost three Republican candidates for the U.S. House. The group has raised $5.6 million this cycle, with 89 percent of that—or $5 million—coming from billionaire casino mogul Sheldon Adelson and his wife Miriam.