The rally on Illinois Street just off of Michigan Avenue was held near the Egyptian consulate.
"Considering the violence that was unleashed by the regime on peaceful protestors over the last couple of days, it's not strong enough language. President Obama needs to be forthright," said rally organizer Laith Saud.
Obama has stopped short of calling on Mubarak to step down. Instead, Obama says Mubarak should consider his legacy and the future of his country.