I apologize for not getting my facts correct, I should have done more research. I apologize.
Still, 23 Democrat seats are up for grabs in 2018, so a supermajority is possible, however unlikely.
That said, if the worst case scenario happens and the Republicans do get everything they need to pass amendments uncontested, will they? And if so, how far do you think they'll go?
They'll go far enough to ensure that even if they ever lose control of government (which they won't), their agenda won't be stopped.
1. Homosexuality will be illegal
2. Repeal of the 13th-15th amendments (I'm definitely sure the 14th will go, the others are up for grabs)
2a. Anyone who became a citizen because of the 14th amendment, or because both parents became citizens via the 14th amendment, will have their citizenship revoked. Permission to remain in this country depends on their (or their parents') country of origin.
3. Balanced budget amendment (though I'm not sure how much they care about this anymore)
4. Amendment ruling Islam illegal
5. Expansion of the 2nd amendment to specifically say any regulation of guns anywhere is illegal
6. The right to protest will be revoked
6a. Speech against police will be ruled a federal hate crime
7. Voting rights and voting districts will be decided upon by the states. The federal government will not have the power to override a state's decision. (This can allow rampant voter suppression, gerrymandering where one district has 3,000 people and another 800,000, etc)
8. All environmental regulations are now unconstitutional in any state
9. Life begins at conception. Abortion is now a capital federal crime for the woman and the abortion provider
10. Capital gains taxes and inheritance taxes are now illegal. A person can not be taxed more than $100,000 by states and the federal government.