Given the Target and Argument texts detect the stance that the argument has towards the topic. There are three types of stances "in favor", "against", and "neutral". 

Topic: Open primaries
 Argument: Open primaries would rarely lead to two nominees of same party.
neutral

Topic: Earmarks
 Argument: Earmarks have already been significantly reformed.
neutral

Topic: Constitutionality of US health insurance mandates
 Argument: Insurance mandates set dangerous precedent for federal power.

against