UNITE HERE, the parent of Culinary Local 226, is running a multimedia campaign to persuade Sen. Dean Heller to vote against a measure that would exempt tribal casinos from the National Labor Relations Act.

The measure, which passed the House earlier this year, is a big test for labor and obviously important to UNITE HERE, which represents about 12,000 Indian casino workers. The ads, one digital (Facebook and Twitter) and one Pandora radio, use the #MeToo movement to argue that workers would "lose workplace protections." The union says it is a mid five-figure buy targeting inveterate female voters.

The tribes have argued that they have been stripped of their sovereignty by being treated differently than local and state governments under the NLRA. But labor organizations say this is about commercial enterprises, not government entities.

The vote in the Senate is expected to be close.