The incidents involved a candidate from Virginia seeking a Senate seat and two men running for House seats from Minnesota and Texas.

The incidents involved a candidate from Virginia seeking a Senate seat and two men running for House seats from Minnesota and Texas.

Penalties come amid calls for greater oversight; company pledges to proactively police 'insider trading' on platforms.

The prediction market has banned Mark Moran, Ezekiel Enriquez, and Matt Klein from using the platform for at least five years.