Rahm Emanuel is proposing a far-reaching measure to crack down on betting in predictive markets in Washington as part of an effort to call attention to what he sees as a culture of corruption gripping the nation’s politics. The proposal from the potential 2028 Democratic presidential candidate would apply to leaders and employees across the executive, legislative and judicial branches of the federal government. It would also notably apply to their families. Emanuel also said, if elected, he would establish a division within the Justice Department to investigate such betting.