All he would need is a large amount of foam that could expand in a vacuum without bursting from the lack of pressure several hundred pounds would expand into a huge diameter depending on how much would mean how big the ball was ten kilometers twenty thirty an hundred. He has the ship to escape the explosive expansion, and in a counter rotating orbit he could sweep the sky of all satellites. With enough coverage the only country that had satellites would be the ones he approved of. This is the threat of space superiority along with dropping tungsten rods on any city he wanted to.

quote wikipedia
In the case of the system mentioned in the 2003 Air Force report above, a 6.1 by 0.3 metres (20.01 ft × 0.98 ft) tungsten cylinder impacting at Mach 10 (11,160 ft/s; 3,403 m/s) has a kinetic energy equivalent to approximately 11.5 tons of TNT (48 GJ).[9] The mass of such a cylinder is itself greater than 9 short tons (8.2 t)

the foam ball is from a series of science story about habitat one the first space habitat and following stories to show possible solutions. Not sure where i found the stories been a few years.