The two rival Palestinian factions have failed to heal their political disputes since Hamas fighters expelled Fatah from Gaza in a short war in 2007
"Just had a very open and successful presidential election. Now professional protesters, incited by the media, are protesting. Very unfair!" he tweeted on Friday.
On the East Coast, protests took place in Washington, Baltimore, Philadelphia and New York, while on the West Coast demonstrators rallied in Los Angeles, San Francisco and Oakland in California, and Portland, Oregon.