The National Organization for Women targets all three branches of government.
NOW targets the elected branches of government in a number of ways. It supports candidates that it approves of by (among other things) endorsing them and by donating money to them. It lobbies members of Congress and the executive branch on a face to face basis.
NOW also targets the judicial branch. One way that it does this is by submitting amicus curiaebriefs to the courts on issues that are of importance to NOW. These are briefs that support one side of a case, such as this one, that NOW is not directly involved in. NOW also brings law suits of its own.
In these ways, NOW targets all three branches of government.