Real political change requires a Constitutional majority. That is, a majority sufficient to amend the Constitution. To remind us, that will require a two-thirds majority of both houses of Congress, plus a majority in each house of three-fourths of the state legislatures. Once we have had this kind of majority of non-RINO's for a decade or two, our political work will be done. I do not intend to hold my breath waiting for this though.
There is the politics of getting elected and the politics of governing after one is elected. Either way, political change comes slow. But I dont agree with you that political change can only come about through a constitutional amendment. The Constitution grants all legislative powers be vested in the Congress. These representatives have the power of the people, to make law, as they see fit. With more conservatives holding power in Congress, America could be returned to it's more traditional beliefs and values. That would mean reduced taxation and smaller government.
While the Constitution is a political governing document, it doesn't specify or stipulate, anything to do with political parties. Which is what my argument was all about.
But don't give up, not yet. In another 70 years, things can do another 180. It's happened before and it can happen again. That may be too late, for you and I, but it's not to late for America.