I just went to the whitehouse.gov/contact site...
I sent this message:
"Let Palestine be a real State as they were before the occupation. Please.
"Just vote NO or abstain.
"It's not that difficult.
"Thank you Mr. President."
Here's what was displayed when I clicked "submit":
Our Apologies....
The site is currently undergoing maintenance. We appreciate your patience while we make some improvements.
Please check back soon.
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Gimme a break.
UPDATE: It finally worked. It's difficult though.