If they fall below 10% though it causes all sorts of problems for the Colorado GOP in the future - for instance, their candidates would only be allowed to raise half as much money as Democrats in the state.
You start losing lawsuits at that point.
How would it fair in terms of a equal protection case?
The Democratic/Baathist/Communist party is effectively fused with the state, dissent against the party becomes dissent against the state.
And what would the State's rational be for muzzling free speech? They want to discourage factionalism? They want to avoid ballot crowding?