  A sextet quark sector of QCD, together with the sextet higgs mechanism, would
produce a major change in the strong interaction above the electroweak scale.
This change may already be evident in Cosmic Ray physics and, if so, dramatic
effects are to be expected at the LHC. In this paper we discuss whether
evidence for the sextet sector could be seen at the Tevatron.
  A major consequence of the connection between QCD and electroweak symmetry
breaking is the strong coupling of the pomeron to the electroweak sector. At
the Tevatron, the energy is too low to produce vector boson pairs directly via
double pomeron exchange, but a number of small cross-section effects could be
seen in diffractive, and diffractive related, processes involving $W^{\pm}$ and
$Z^0$ vector bosons. Probably, the most important feature that could be
decisively established is that the production cross-section for $W^+W^-$ and
$Z^0Z^0$ pairs has an anomalous component with event characteristics different
from the Standard Model. This would be the first indication of what should
become a dominant, very large, cross-section at the LHC.
  If the sextet quark dynamical mass scale is well above the top quark mass,
then the production properties of $W$'s and $Z$'s could be the only new physics
visible at the Tevatron scale. If this scale is lower the situation could be
more subtle. The observed $t\bar{t}$ events could originate from the $\eta_6$ -
the ``sextet higgs'', even though they can be understood perturbatively. The
interpretation of the top quark mass would, however, be different and
non-perturbative decay modes should also be seen. A jet excess at large $E_T$
would provide supporting evidence for this picture, since $\alpha_s$ evolution
should stop at $E_T \sim$ ``$m_{top}$''.
