DENVER (AP) — A labor question that threatens to fracture Colorado Democrats moved closer to a possible collision Monday, when a Democratic House committee voted to move ahead with a measure to expand labor rights for firefighters. The Democratic governor threatened to veto an earlier version of the measure.

The bill would expand labor rights for firefighters even in localities that have voted to bar them from organizing. As introduced, it would have allowed firefighters to collectively bargain even in places where local voters barred the practice.