Conservationists don't vote for republicans, but some democrats are conservationist. Thus, democrats don;t vote for republicans.
A.Is the argument valid? If not what rule is broken?
B. What type of claim is the conclusion?
The second premise of the above syllogism is particular, and the conclusion is not particular. Therefore, this syllogism is invalid. It breaks the rule that if one premise is particular, then the conclusion must be particular.