"Screw Obama," would be an acceptable substitute.
However, if you wish to try the language in use at the time of the Framers, the verb "to swive" would carry the same meaning. "Swive Obama" would be a fine substitute that even Ben Franklin would have appreciated.
And the horse he rode in on. Or, more accurately in the case of his “wife”, the Wookie that he rode in on.
:-)