You are correct, My Friend, @mescalone on all 3 points, you have quite simply and eloquently, I might add, utterly destroyed my attempt at logic in my prior post. Kudo's Sir.
Perhaps you're overstating my "victory". I'm a huge Reagan guy so I tend to see all things conservative in his reflected light!
I believe that Reagan was principled, but always pragmatic...his goal was conservative policy and legislation but he was willing to take what he could get even if it didn't pass the conservative "purity" test. For example, if other nation's are unfairly closing their markets to our industry...while we hold ours open...that's not fair trade. So a tariff, when used with discrimination, can pry open markets to create more genuinely free trade. So the goal is a conservative one, though the method of using tariffs is an imperfect...but perhaps necessary tool.
DACA is similar to Reagan's amnesty. Give some on an amnesty issue to create a long term conservative fix to immigration. In Reagan's case, the Dems failed to uphold the "security" side of the deal...Trump has learned from that and WILL ensure the security side of such a deal IS upheld this time. So, again, the goal is a conservative one though it does necessitate some concessions to achieve.
Pragmatism is not a byword for setting aside principles. It is the necessary application of common sense and practicality that allows us to get the MOST conservative solution possible into legislation. Without pragmatism, we get a bunch of folks running around feeling good about their conservative purity...and absolutely nothing achieved in terms of furthering conservative principles and legislation.
Anyway, I expound to much...partly because I enjoy discussing issues with you. You have a sharp and open mind...and a strong set of principles. So kudos to you, sir.