No, I discard entirely the notion that homosexuality is the result of abuse. Abuse or not, it is a conscious decision people make. They can just as easily make the decision NOT to be homosexual. Blaming "abuse" is just a cop-out.
And frankly, I can't see Dick Cheney or Alan Keyes abusing their daughters anyway.
Sorry, but there's no mileage to be gained from this for the anti-conservative crowd, though that won't stop them from trying.
As I stated earlier, the abuse may have been verbal (boy wouldn't that be a stretch for Alan) or even lack of being there at critical times. Let's face it, Alan's agenda required massive time away from the family. Lack of adequate "father figure" may have come into play.