  We construct the first X-ray selected sample of broad line radio-loud AGN
from the EMSS survey. In order to test unifying schemes for radio-loud objects,
their spectral and statistical properties (both flat and steep spectrum
objects) are examined and compared with those of other samples of blazars. The
X-ray selection allows us to explore properties of radio-loud quasars 10-100
weaker in the radio band than classical samples. The most convincing
interpretation of our results is that there are no radio-loud quasars whose
synchrotron emission peak reaches the EUV-soft X-ray band at these (radio) flux
levels. Moreover, due to the comparatively weak non-thermal emission, a
quasi-thermal component appears to contribute at optical-UV energies. The
detection of sources at low radio fluxes also reveals a large population of
steep spectrum quasars and the lack of the predicted turnover in the quasar
(radio) counts. The evolution of X-ray selected radio-loud quasars does not
significantly differ from that of radio-selected ones, and flat spectrum and
steep spectrum sources appear to behave quite similarly.
