Being that it pertains to the President's Cabinet, I'm sure that it's some obscure law that only afew know about.
It's NOT obscure at all and anyone posting to FR should know about it!
I got caught up in my research with Democrat bloggers discussing how they can get that law changed so that Billy Jeff can be in Hillary's Cabinet if she wins in 2008. Seems that some of them think B. Clinton can "clean up the mess in the world that W has made". If they can't skirt the law, they want him for Ambassador to the UN...Another blog said Bush should be impeached because he broke the Anti-Nepotism law by appointing Liz Cheney to the State Dept. and they listed other examples of relatives being appointed. Totally ridiculous.
Sean Hannity did say, at least once, that he wanted Jeb for W's veep...he does get excited at times, though, so likely he was unaware of the law or forgot about it or was caught up in the moment.