If or when you receive a letter from the state or national political parties asking for money, don’t throw it away. Instead, write a short note to the effect that you will not donate money to them until they make a firm commitment to the 10th Amendment and act on that commitment by offering substantive policies and by supporting candidates who will implement them.
I recently sent such letters to the LA Republican Party (referring them to the Tenth Amendment Center – so they could learn about the multitude of state nullification actions going on across the country) and to the NRA (specifically mentioning the Firearms Freedom Act in that letter).
Encourage others to do likewise. If these parties and organizations get enough financial pressure, they will give the 10th Amendment a more favorable look.