“What kind of showing is required . . . “
There are three standards: “beyond a reasonable doubt”; “by clear and convincing evidence” or “by a preponderance of the evidence”, (in other words, it is more likely than not).
By which one of those standards do either of you think candidate McCain has proven he is a conservative?
With all due respect . . . truly . . . that doesn't tell me anything, because the standards lack objective criteria.
Earlier today Tom Delay said something similar, to the effect that McCain had to show . . . had to prove . . . to conservatives (as if he was speaking for all conservatives) his worthiness before he could expect conservative support. I don't have a problem with anyone demanding such proof, I just don't understand what he could do to prove himself without holding office and then meeting expectations to most everyone's satisfaction.