firstly, look at the big brain on YOU! God. Is this Homeland Security? Is this a secret Citizenship test?

Apropos of almost nothing I am going to go with Coolidge, not because of ideology or anything other than Buchanan was a 'lifelong' bachelor. Given the context of the 1800s we all know what 'lifelong bachelor' implies don't we?

For example, if the question had been 'who would you pick to go see the Sex in The City movie with?' it would totally be Buchanan.