From the New Republic:
LOL, you might be thinking. Obama can’t be the vice president. That would place him at the top of the line of succession, and the Constitution limits him to two terms. Clinton would end up in court before she ended up in the White House if she pulled something like that. I’ll grant that if Democrats nominate Barack Obama to be their vice presidential candidate next year, it would be somewhat controversial. But here Democrats can borrow tactically from the literal-minded conservatives who have seized on syntactic oddities to unravel Obama’s domestic agenda. As a purely textual matter, the Constitution merely prohibits Obama from being elected to a third term. It doesn’t necessarily prohibit him from actually being president again, should Hillary Clinton no longer be able to serve. And were he on the ticket, Clinton’s potential liabilities with Obama loyalists would disappear.