I don't think anyone here is disavowing anyone. On the contrary. The argument isn't, "yeah, there are a lot of Randians in government, but they're not "true Randians," the argument is that there are few (very few) Randians in government, not many, and not enough.
Ron Paul's son is named after Ayn Rand. Did we get to "many" yet?
We got to 3. Out of 541 members in house and senate, and 7 members of the Board at the Federal Reserve. I'm sure the actual number is more than 3, since a lot of them likely stay quiet, but I doubt it's much more than 3, or anywhere near "many." Especially since Democrats don't like Randian ideas because they are decidedly pro-capitalist/anti-socialist, and Republicans don't like her ideas because they are decidedly anti-religious/anti-corporate cronyism. Democrats need to keep getting elected by pushing more social programs, and Republicans need to keep pushing god, and getting corporate kickbacks and lobbying.