Ryan Zinke hosted an open house at his Billings Campaign Office, the old Cook Travel building.
Zinke was greeted by dozens of supporters.
Job creation, energy independence, and cutting back the costs of healthcare were some of the main points he brought up.
Last week, Campaign Legal Center and Democracy 21 filed a complaint, alleging illegal contributions were made to Zinke's campaign.
In regards to the complaint filed with the Federal Election Commission, Zinke said they did everything exactly by the law.
The investigation is ongoing. A copy of the complaint can be found at here