Please assume that you are not in a committed relationship.
Please don’t respond to the poll if you are uninterested in having sex with a woman, as it would screw up the validity of the results - you are, of course, more than welcome to comment even if you don’t vote.
ETA: No, I did not realize that there was another Natalie Portman thread when I posted this, weird…
You left out “None of the above”. Neither of 'em holds any interest for me other than for their celebrity status, he as the front-man for a successful party political machine and she as an actress who to my ignorant self is much the same as any of a hundred others. And while la Portman is undoubtedly hotter than anyone I ever have had sex with, I doubt she would look at me twice, and I’m not one for going where I’m not wanted, and also I’ve no idea whether she is any good in the sack.
The assumption is that the other party is a willing participant in any of the options. It’s a hypothetical. And it’s “would rather” between the options - so even if you find all of the options to be just terrible, you still have pick which you would rather do. Like, “would you rather fall down a flight of stairs in public or spil, soup in your lap” - neither are fun, but the question is pretty straight forward.
I chose dinner with Obama only because I’m married. If I wasn’t married, my answer would be different.
So you’re just willfully ignoring the OP now?
I missed that. In that case I would pound Ms. Portman into next october.
I thought my list of assumptions/rules was pretty short 
Dinner with the President, because I would love to sit down and have a one-on-one conversation with him. Natalie Portman is not my type (I like fuller-figured women) and I would not be interested in having dinner with her unless my daughter came along. She would love to meet the actress that played Padme Amidala.
I’m not particularly fascinated by either of them, but I AM fascinaed by Natalie Portman’s vagina. So there you have it.
Joe
I’d rather have dinner with Ms. Portman. I think she’s incredibly beautiful, but f I’m having sex with her, it means either that my wife has died, that I’ve gotten a divorce from my wife, or that I’m cheating on my wife. I don’t care to have any of those happen.
I voted and campaigned for Obama, but I don’t see any reason to break bread with him.
Sex with Natalie Portman.
And she’s gonna be wearing either a Queen Amidala or a Senator Amidala getup. Can’t decide on which.
Dinner with Obama, because I reckon that’s much more likely to lead to more open doors professionally afterwards. And I’m half-looking for a new job.
Can me and Natalie Portman both have dinner with Obama? I see no reason not to do both…
I’m a bi woman but Natalie Portman does nothing for me (although she’s certainly lovely). And she seems kind of annoying (based on every time I have heard her/read an interview). So it’s Obama for me - not that I’m all that enamored with him, but he seems like a nice guy and his life is much more interesting to me.
I thought about that option, but then I’d have to include a threesome as well, to balance things out, and that just seemed excessive.
I meant to imply more of a parallel universe where you’re not in a committed relationship - in other words, the relationship is simply assumed away, rather than accounted for as part of the impications of the question.
I noticed that after I re-read the OP. Actually I voted without reading it, as it seemed simple enough; silly of me, as I expect I’ve started more polls-with-qualifications than most on the board.
That said … unless this were a parallel world in which I never met my wife, I’m still choosing nothing but dinner. I love my wife. Other women bore me.
It boils down to dinner with a sitting US president, or sex with a really hot girl. I’ve had sex before, sometimes with pretty hot girls, and likely will again in the future. I’ve never had dinner with the president and probably never will. I’ll take dinner with the president.
Sex, I can stop at Burger King on the way home.
“Thanks, Nat - you’re the best. I hate to plow and run, but I gotta meet the Prez for a whopper. Peace.”
Five Guys doesn’t serve whoppers.