The state of Colorado filed a lien on Sen. Mark Udall's (D., Colo.) campaign this week for not paying Colorado's unemployment insurance, according to the Denver Business Journal.
The state filed the lien for the campaign's failure to pay $458 for state unemployment insurance, as reported by Colorado Peak Politics.
Udall is up for reelection in November. Some are predicting the Senate Democrats will lose control of the chamber in the upcoming elections.