Final answer:
The Democratic Party has mixed opinions, the Republican Party generally supported the war, and the Green and Libertarian parties are typically opposed to the war in Afghanistan.
Step-by-step explanation:
The standpoints of the Democratic, Republican, Green, and Libertarian parties on the war in Afghanistan vary. The Democratic Party has mixed opinions on the war, with some members supportive and others opposed. The Republican Party generally supported the war, although there is some variation among individual members. The Green Party and the Libertarian Party are typically opposed to the war, as they both tend to emphasize non-interventionist foreign policies.