If an intelligent life form contacted earth, and the US was the first to receive the signal, do you think Obama would respond as the speaker for humanity, or someone else?
Obama would promise them something then cut off their nuts.
Probably try to take advantage of the situation to the detriment of the world. We'd make a show of speaking for the planet and sharing any benefit they brought with them, but over 200 years of "me first" says we wouldn't be honest or share it all.
The president or maybe the UN chief....
probably the pope, in all honesty
The President would offer them anything for their vote.