1. If he had an interest in political office, he'd have no problem getting the votes to elect him to the US Senate in the upcoming election in NJ to fill the Lautenberg vacancy. He's not interested.
2. Seems to have been in the works for a long time. Ron was the messenger. Rand is (will be) a candidate seeking that office for real.
3. Yes and No. James Buchannan was the only unmarried President in US history, so there has been one. Does it matter? Perhaps, to some people. But, does it matter, given that the Judge has no interest in running for any office? Nope.