A coalition of right-wing "constitutional sheriffs,” who claim legal power in their jurisdictions that exceeds U.S. federal and state authorities, has a new calling: investigating conspiracy theories that the 2020 election was rigged against former U.S. President Donald Trump.

The Constitutional Sheriffs and Peace Officers Association has teamed up with True the Vote, a Texas nonprofit and purveyor of debunked voter-fraud claims, to recruit like-minded sheriffs nationwide to investigate allegations the 2020 U.S. election was stolen and to more aggressively police future voting.

The partnership, detailed last week at the association’s annual gathering in Las Vegas, aims to intensify a movement already underway. At least four ideologically aligned county sheriffs in the states of Michigan, Wisconsin, Kansas and Arizona have launched election-fraud probes since the 2020 vote. None has established evidence of systemic fraud.