@ semck:
So you have a two part answer, the first problem being, much like invictus argues, that a person can judge for himself based on the merit of voting records, statements, etc. whether or not another person is, indeed a socialist. The opinions of other socialists need not enter the equation.
As with Invictus, I won't disagree with this statement, since it doesn't seem to contradict my position, which is that it is not unreasonable to judge whether or not a person belongs to a club by the opinions of other members of that club when overwhelming consensus is reached that he is or is not. It's not foolproof, but its certainly not unreasonable.
In your second point, you seem to attempt to dismiss my argument with a counterexample of good old GW. This would be effective, if you could show a consensus amongst self-identified conservatives that GW is not one of them - the same consensus that socialists would give about Obama. I presume that you cannot do so, and being a reasonable man will admit that it is unlikely that such a consensus exists.
To your final... afterthought.... I can name several examples of socialists (and other "outlying" political parties who have been voted into office, who have not tried to hide the fact that their views are not mainstream, since it helps brings their party's message further into the forefront. Can you, Senator McCarthy, present examples of your claim, that there exists a conspiracy among avowed socialists to cover up other socialists election to office because they are afraid of backlash and obtaining political goals? Or is that just conjecture?