A semantic argument trying to replace substance? I’ve never seen that in a political discussion before. (lol) RINO can refer to any politician who uses the Republican name brand but doesn’t adhere to conservative principles. Having previously been a Democrat and switching to the Republican Party name brand for political convenience (like union leader Ronald Reagan for example) is not required.
That doesn't work for a wide variety of reasons ~ one of which is that ALL Conservatives aren't Republicans, and another that ALL Republicans aren't Conservatives.
It's also impermissible to confound TEA Party with REPUBLICAN Party, and vice versa.
Ronald Reagan never ran for political office as a Democrat.
Some terms are perfectly suited to politics ~ to wit, RINO; other terms are perfectly suited to ideology ~ to wit, LEFTWINGTARD (which has multiple variations).
Remember, as so many others have had to learn the hard way, COMMUNISTS cannot be dealt with like they were simply members of a political party, nor can ISLAMOFASCISTS be thought of as just another religion.