The author addresses the current militarization of local police forces to suppress any opposition to the rule of the One Percent. Thus, there is no longer a need for the current ruling class to call in the Army or the National Guard to suppress dissent.
...the harder they [Occupier protestors] pushed, the harder they were pushed back - with violence. Protesters met with police wearing body armour, face shields, helmets and batons; police legally undermined Americans' right to assemble freely with "non-lethal" weaponry like tear gas, rubber bullets and sonic grenades. There was no need for the president to call in the army. An army, as Mayor Bloomberg quipped, was already there.