  Marsh et al. (2016) have recently reported the discovery of a radio-pulsing
white dwarf in the cataclysmic variable AR Sco. The period of pulsations which
are also seen in the optical and UV is about 117 seconds. High intensity of
pulsing radiation and non-thermal character of its spectrum leave little room
for doubt that the white dwarf in AR Sco operates as a spin-powered pulsar and,
therefore, is in the ejector state. We show that this system is very much
resembling a well-known object AE Aqr. In both systems the compact components
are spin-powered and have relatively strong surface magnetic field of order of
100-500 MG. They originated due to accretion spin-up in the previous epoch
during which the magnetic field of the white dwarf had substantially evolved
being initially buried by the accreted matter and recovered to its initial
value after the spin-up phase had ended.
